Powertrain figures — Smart Fortwo (450)

934 powertrain illustrations for the Smart Fortwo (450) — schematics, exploded views, and procedure photos drawn from the manuals. Open any figure for its source page, part references, and a copyable link.

Smart fortwo front end with service screen highlighted and numbered callouts marking headlight bulb access points. 450 Headlight bulb replacement procedure for Smart 450 fortwo Engine · p8 Front headlamp assembly with labeled bulbs A, B, C and turn signal bulb removal/installation steps. 450 Front-headlamps bulb types and turn signal light Engine · p9 Two transmission images showing number location: lower engine side for 450/452, below starter for 454. 450 Transmission number location on 450, 452, and 454 chassis Transmission · p20 Multi-panel technical diagram showing transmission removal steps with numbered callouts for Smart fortwo. 450Exploded view Transmission 717.407/7408/7476 removal/installation Transmission · p21 Transmission exploded view and bracket assembly with 20 numbered service steps and part callouts. 450Exploded view Transmission removal/installation procedure with numbered Transmission · p22 Table showing numbered service steps 20-27 for transmission maintenance and diagnostic procedures with part numbers and menu locations. 450Location callout Service procedures for transmission, clutch, and STAR Transmission · p23 Two tables showing bolt part numbers, designations, and torque specifications in Newton-meters for transmission and exhaust system connections. 450Torque table Transmission 717.4 and exhaust system bolt torque Transmission · p24 Multi-panel technical diagram showing transmission removal steps with labeled components and location guide for smart fortwo 450. 450Exploded view Transmission 717.407/1408 M475 removal and installation Transmission · p25 Technical diagram of transmission assembly with numbered callouts and step-by-step removal instructions table. 450Exploded view Transmission removal procedure with exploded view showing Transmission · p26 Service procedure table for smart 450 manual transmission with STAR DIAGNOSIS diagnostic steps and menu navigation instructions. 450 Model 450/3/4 transmission service procedures including oil Transmission · p27 Service manual page showing clutch removal steps with engine diagram and six detailed photographs of clutch assembly components. 450Exploded view Clutch removal and installation procedure for smart fortwo Clutch · p28 Service manual table with clutch reassembly steps 17-27, part numbers, and STAR DIAGNOSIS diagnostic procedures. 450Location callout Transmission reassembly and STAR DIAGNOSIS procedures for Transmission · p29 Torque spec table and two tool illustrations for clutch bolt installation 450Torque table Clutch module driver bolt torque specifications 450.3 and Clutch · p30 Engine coolant drain/fill service procedure diagram with four numbered detail photos and component callouts for Model 450. 450Location callout Coolant drain and fill procedure for smart fortwo 450 Cooling · p31 Service procedure table with engine coolant maintenance steps and two diagrams of pressure pump and filling device tools below. 450 Cooling system service procedures steps 9-15 for Smart 450 Engine · p32 Service manual page showing belt pulley removal steps with engine diagram and close-up photos of pulley location. 450Exploded view Belt pulley removal and installation procedure for smart Engine · p33 Service manual table with numbered steps 13-24 for chain repair and cylinder head installation. 450Torque table Chain repair service procedure steps 13–24, including rivet Engine · p34 Service manual page with five photographs (A-D) of engine timing chain removal and installation procedures, plus numbered step instructions. 450Location callout Timing chain replacement procedure for smart fortwo 450 Engine · p35 Service procedure table with numbered steps for chain repair and maintenance instructions 450Torque table Chain repair procedure steps 13-24 including rivet link Engine · p36 Engine timing chain assembly diagram with nine numbered component callouts and three detail photos. 450Exploded view Timing gear replacement procedure with callout views of Engine · p37 Timing chain service steps 5-13, torque chart, pulley tool illustration, and commercial diagnostic tools. 450Torque table Timing chain drive disassembly and reassembly procedure Engine · p38 Engine cylinder head with two numbered callout points showing valve clearance compensating element location 450Location callout Remove and install hydraulic valve clearance compensating Engine · p39 Service manual page showing spark plug removal and installation with labeled diagrams and callout steps. 450Location callout Spark plug replacement procedure for 160.910/920 engine in Engine · p40 Torque specifications table for spark plugs showing 28 and 23 Nm values 450Torque table Spark plug initial and retightening torque specifications Engine · p41 Oil filter assembly diagram and numbered service procedure table for smart fortwo engine maintenance. 450Location callout Engine oil and filter change procedure for smart 450 model Engine · p42 Torque specs and oil capacity tables for oil filter screw caps and engine lubrication systems across engine models 160.910, 160.920, and 660.940. 450Torque table Oil filter screw cap torque specifications and engine oil Engine · p43 Technical diagram showing piston and cylinder liner with three measuring points and work instructions for measuring cylinder bore diameter. 450Location callout Cylinder bore measurement procedure and specifications for Engine · p44 Smart engine 135.9 showing engine number position on transmission side of crankcase, three chassis codes visible. 450Location callout Engine 135.9 with engine number location marked on Engine · p45 Service procedure photos showing fuel distributor removal and fuel rail with three injectors 450Location callout Removing fuel distributor with injection valves on 450.3/4 Engine · p46 Service manual page showing engine removal steps with numbered callouts on multiple engine bay photographs. 450Location callout Engine 160.920 removal and installation procedure for smart Engine · p47 Multi-panel diagram showing generator, engine bay, and step-by-step removal instructions with numbered callouts. 450Location callout Engine removal procedure for smart fortwo 450/451 showing Engine · p48 Numbered service steps for engine removal with callouts, part numbers, and special instructions. 450Location callout Engine removal service procedure steps 19-44 with part Engine · p49 Torque specification tables for engine 160.920 showing cable, bolt, and screw tightening values in Newton-meters. 450Torque table Engine 160.920 torque specifications for starter Engine · p50 Service procedure for O2 sensor removal with photos and step-by-step instructions for Smart fortwo 450. 450Location callout Removal and installation of oxygen sensor downstream of Exhaust · p51 Service procedure for O2 sensor replacement with numbered callouts on engine photos and detailed step-by-step instructions. 450Exploded view Oxygen sensor removal and installation procedure for Smart Engine · p52 Engine camshaft removal procedure with numbered callouts and step-by-step instructions. 450Location callout Camshaft removal and installation procedure for 450/451 Engine · p53 Torque specification table for camshaft bolts on smart fortwo engines with wrench tool illustration 450Torque table Engine camshaft sprocket and bearing cap bolt torque Engine · p54 Engine diagram showing roller drag lever and cylinder head with numbered callouts for cam follower service. 450Location callout Camshaft follower removal and installation procedure for Engine · p55 Exploded view of chain tensioner assembly with numbered callouts and removal procedure table. 450Exploded view Chain tensioner removal and installation procedure for Engine · p56 Four engine bay photographs showing ignition coil locations and removal procedure for three cylinders, with step-by-step service instructions below. 450Location callout Remove and install ignition coils on smart fortwo 450 Engine · p57 Engine bay photos and schematic showing intake air temperature sensor location and removal steps. 450Location callout Intake air temperature sensor B17 removal and installation Engine · p58 Engine intake manifold removal procedure with 12 numbered callouts showing spark plugs, vacuum lines, fuel lines, and cables. 450Location callout Removing and installing intake manifold on 450/451 chassis Engine · p59 Engine intake manifold assembly diagrams showing bolt callouts and fuel injector cylinder locations Y62/1, Y62/2, Y62/3. 450Location callout Intake manifold removal/installation procedure with fuel Engine · p60 Service procedure table showing steps 13-20 for intake manifold removal, with torque specs and part numbers for bolt installation. 450Torque table Intake manifold removal and installation procedure with Engine · p61 Service procedure for intake manifold pressure sensor replacement with numbered callouts and engine diagram. 450Location callout Removing and installing intake manifold pressure sensor B28 Engine · p62 Technical diagram showing piston ring types, removal tools, and step-by-step installation instructions for smart fortwo engine. 450Exploded view Piston ring removal and installation procedure for smart Engine · p63 Service manual page showing piston ring installation steps, measuring caliper and pliers tools with part numbers. 450Location callout Engine piston ring installation procedure with oil scraper Engine · p64 Exploded view diagram and photographs of piston, connecting rod, bearing cap, and cylinder liner components for smart fortwo 450 engine. 450Exploded view Piston removal and installation procedure for 160,920 in Engine · p65 Two cylindrical main bearing shells labeled 11 and 13 with numbered callouts. 450Exploded view Main bearing shell top and bottom components for engine Engine · p66 Service manual table showing numbered steps for engine component removal, cleaning, checking, and installation with callout notes and part references. 450Exploded view Engine disassembly and reassembly procedure steps 14–30 for Engine · p67 Torque specification tables for crankcase bolts and connecting rod bolts with part numbers. 450Torque table Engine 160.920 crankcase and connecting rod torque Engine · p68 Service manual page showing V-belt replacement steps with numbered callouts and multiple engine bay photographs. 450Torque table Poly V-belt removal and installation procedure for smart Engine · p69 Service manual page showing alternator bolt tightening steps, belt tension gauge use, and torque specs table with tool diagrams. 450Exploded view Alternator installation and belt tensioning procedures for Engine · p70 Engine compartment diagram showing poly V-belt components and removal steps for smart fortwo models. 450Exploded view Poly V-belt removal and installation procedure on 450/451 Engine · p71 Service procedure table for belt tensioning device removal, installation, and adjustment with callouts and torque values. 450Torque table Poly-V belt tensioning procedure steps 6–16 with torque Engine · p72 Labeled diagrams and photos showing rear engine mount location and fastener positions with torque table. 450Torque table Right rear engine mount removal and installation procedure Engine · p74 Torque specification table for engine bolts and rear axle carrier bolts on Smart fortwo 450Torque table Engine 660.940 bolt torque specifications for cylinder head Engine · p75 Tightening diagram showing cylinder head bolt sequence with torque values and socket wrench tool. 450Torque table Cylinder head bolt tightening diagram and torque Engine · p76 Engine charge air cooler location and cleaning instructions with three detail photographs. 450Location callout Charge air cooler inspection and cleaning procedure for Engine · p78 Engine cylinder inspection with endoscope tool and numbered service procedure steps. 450Location callout Cylinder inspection procedure using endoscope and light Engine · p81 Engine V-belt inspection guide with four labeled photos showing belt locations and service steps for smart fortwo 450 chassis. 450Exploded view Inspect poly V-belt for wear and damage on 450 series smart Engine · p84 Service manual table showing V-belt tension testing procedures with retention limits and part numbers for compressor and generator. 450Torque table Poly-V-belt tension checks and installation procedure for Engine · p85 Service procedure table showing air inlet work and headlamp testing equipment requirements 450 Air inlet removal and installation steps with workshop Fuel system · p88 Service manual page showing alternator removal steps, two engine photographs with numbered callouts, and torque specifications table. 450Exploded view Alternator removal and installation procedure for Smart Engine · p94 Service procedure showing four engine bay photos with numbered callouts and detailed removal/installation steps for catalytic converter replacement. 450Location callout Catalytic converter removal and installation procedure for Engine · p98 Service procedure table showing catalytic converter steps 6-8, O₂ sensor torque spec, exhaust system bolt specs, and wrench socket tool. 450Torque table Catalytic converter removal and installation procedure with Exhaust · p99 Engine coolant thermostat location and removal steps with numbered callouts and torque specifications. 450Torque table Coolant thermostat removal and installation procedure for Engine · p101 Clutch assembly diagram with numbered callouts and torque spec table for engines 160.910/920 and 660.940 450Torque table Clutch plate and catch removal/installation procedure for Engine · p102 Service procedure diagrams showing generator bracket, engine block bracket installation, and removal sequence steps. 450Exploded view Installing and removing engine block support device for Engine · p104 Installation checklist table with part numbers, torque specs in Newton-meters for multiple engine variants. 450Torque table Engine installation procedure steps 15-27 with torque Engine · p105 Torque specification tables for engine support bolts and technical drawing of retainer clip part 450 589 29 63 00. 450Torque table Engine mounts and supports torque specifications for Smart Engine · p106 Six photos showing engine cylinder head removal steps with numbered component callouts and exploded view of cylinder head assembly. 450Exploded view Cylinder head removal/installation procedure for smart Engine · p107 Table showing numbered steps for removing and installing cylinder head, with notes, part numbers, and tool requirements. 450Location callout Cylinder head removal and installation service procedure Engine · p108 Numbered service procedure table showing engine assembly steps and torque specifications chart 450Torque table Engine reassembly steps 33-54 with cylinder head bolt Engine · p109 Torque specification table for engine fasteners and tools required for installation 450Torque table Torque specifications for camshaft sprocket bolt and Engine · p110 Oil pan exploded view diagram with service procedure steps and bolt torque specifications for Smart fortwo 450 chassis. 450Exploded view Oil pan removal and installation procedure for Smart 450 Engine · p111 Step-by-step photos and table showing timing case cover removal with callouts for oil filter cover, bolts, and installation sequence. 450Exploded view Timing case cover removal and installation procedure for Engine · p112 Torque specification table showing M8 clearance hole bolt and M6 blind hole bolt values in Nm. 450Torque table Torque specifications for alternator bracket bolts on Engine · p113 Service manual page with six photographs showing front end components and removal points for Smart fortwo 450 model. 450Location callout Front module removal/installation procedure for chassis Cooling · p118 Service procedure table with 28 numbered steps for front module and cooling system work. 450Location callout Numbered service procedure steps for smart fortwo front end Engine · p119 Generator cover with numbered callouts showing catch lugs and guide pin for removal. 450Location callout Generator cover removal and installation procedure with Engine · p127 Service procedure for ISC actuator removal and installation with numbered callout photos and torque specifications. 450Torque table Remove and install idle speed control (ISC) actuator on 450 Engine · p129 Torque specification table showing screw clamp of charge air cooling at 3 Nm for two engine variants. 450Torque table Engine torque specifications and diagnostic tools for Smart Engine · p130 Nine labeled photographs showing starter removal steps with callouts for clamps, ducting, bolts, and connectors. 450Exploded view Starter motor removal and installation procedure for 450 Engine · p138 Service procedure table with numbered steps 6-17 for engine component removal and installation, plus torque spec tables. 450Torque table Engine starter removal, refrigerant compressor detachment Engine · p139 Multi-panel technical diagram showing turbocharger removal steps with numbered callouts on engine photos and schematic. 450Exploded view Turbocharger removal and installation procedure for smart Engine · p143 Service procedure table showing numbered steps for turbocharger disassembly, removal, and reassembly with callouts and part references. 450Torque table Turbocharger removal and installation procedure steps 3–21 Engine · p144 Table showing banjo bolt part numbers, designations, and torque specs for coolant lines. 450Torque table Radiator and coolant hose banjo bolt part numbers and Cooling · p145 Service manual page showing cylinder leak inspection steps with three photographs and detailed procedure table 450Location callout Cylinder leak inspection procedure for 160.910/920 engines Engine · p149 Two fuel system test tools with part numbers and a table of commercially available diagnostic equipment. 450 Fuel system diagnostic tools: adaptation connector and Fuel system · p150 Service manual page showing air filter replacement steps with photos and table instructions for smart 450 chassis. 450Location callout Air filter element replacement procedure for 450.3/4 models Engine · p151 Engine spark plug replacement guide showing connector puller tool, spark plug connector, and plug location on 450 model. 450Location callout Spark plug replacement procedure for 450/374 chassis with Engine · p153 Torque specification table for spark plug installation and retightening. 450Torque table Spark plug initial and retightening torque specifications Engine · p154 Service manual page showing crankshaft radial seal removal and installation steps with engine diagram. 450Location callout Front crankshaft radial sealing ring replacement procedure Engine · p155 Fuel filter replacement service procedure with three engine bay photos and installation instructions. 450Location callout Fuel filter replacement procedure for Smart 450/451 engine Fuel system · p156 Exploded view of fuel system parts with numbered callouts 16-25 and component labels. 450Exploded view Fuel system components including water hoses, fuel metering Fuel system · p159 Numbered service steps table with detailed instructions for component assembly and routing. 450 Service procedure steps 34-58 for exhaust, coolant, fuel Exhaust · p161 Service manual table with numbered installation steps for heater system on Smart 450.4 model 450 Smart 450.4 stationary heater installation steps 59–73 Cooling · p162 Service manual page showing Brabus SB1 kit retrofit steps with engine component photos and numbered installation callouts. 450Location callout Retrofitting Brabus performance kit SB1 on smart fortwo 450 Engine · p163 Six labeled photographs showing hinge and lock lubrication locations on smart fortwo doors and hatches. 450Location callout Door and flap hinge lubrication points for smart fortwo Engine · p173 Service manual page showing rear drive module removal steps with multiple annotated photographs and diagram. 450Exploded view Rear drive module removal and positioning procedure for Transmission · p175 Service manual table showing removal procedures for engine bay components with numbered steps, model specifications, and reference codes. 450Exploded view Engine compartment disassembly procedures for smart fortwo Engine · p176 Diagram showing Z connector sleeve locations on smart fortwo with reference table listing component designations and pin assignments. 450Schematic Z connector sleeve locations and assignments for wiring Engine · p187 Three detail photos showing engine bay components labeled X28/5, X28/7, R12/1x1 with location diagram. 450 Engine compartment lubrication points and fluid fill Engine · p191 Technical diagram showing engine compartment wiring connectors and their locations. 450Location callout Engine bay wiring and connector locations with numbered Engine · p194 Table listing connector pin numbers, wire colors, and engine codes for Smart fortwo interior/engine connector. 450Wiring diagram Interior/engine connector pin assignments and wire color Engine · p196 Engine compartment connectors on Smart fortwo left side with labeled callouts G3/1x1 and G3/2x1. 450Location callout Line and plug connector locations in left engine Engine · p198 Wiring diagram table showing O2 sensor connector codes G3/1x1 and G3/2x1 with cable color assignments and notes. 450Wiring diagram O2 sensor connector wiring codes and cable colors for TWC Engine · p199 Service manual page showing oil pressure switch S41/1 location with two engine bay photos and numbered procedure steps. 450 Oil pressure switch location and checking procedure for Engine · p212 Service procedure for oil pressure switch with engine photos, numbered steps 1-15, and parts reference table. 450Location callout Oil pressure switch (S41/1) removal, checking, and Engine · p213 Table showing oil pressure values for cold, idle, and operating temperatures with part number 450 589 13 21 00. 450Torque table Engine 660 oil pressure specifications at various operating Engine · p214 Transmission first gear schematic showing numbered components and power flow path with color-coded lines. 450Schematic First gear power flow through input shaft, idler gear Transmission · p215 Cross-section diagram of transmission second gear engagement with numbered components and colored power flow paths. 450Schematic Second gear power flow through input shaft fixed gear to Transmission · p216 Cross-section diagram of transmission third gear engagement with numbered components and color-coded power flow path. 450Schematic Third gear power flow through fixed gear, idler gear, shift Transmission · p217 Cross-section transmission diagram showing 4th gear power flow path with colored callout lines and numbered components. 450Schematic 4th gear power flow through input shaft fixed gear to idler Transmission · p218 Cross-section diagram of 5th gear transmission mechanism with numbered components and color-coded power flow path. 450Schematic 5th gear power flow through transmission showing fixed gear Transmission · p219 Cross-section diagram of transmission showing shift forks and gear engagement in neutral position 450Exploded view Automated manual transmission shift lever positions and Transmission · p220 Cross-section diagram of reverse gear mechanism showing gears 16, 17, 18 and power transmission route. 450Schematic Reverse gear power flow transmission schematic with fixed Transmission · p221 Transmission control unit N15/6 mounted under driver seat with interior photo and component diagram. 450Wiring diagram Automated manual transmission control unit N15/6 location Transmission · p222 Exploded view of transmission assembly showing shift forks, drums, shafts and motors labeled 1-8. 450Exploded view Automated manual transmission shift lever positions and Transmission · p223

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