HVAC & Comfort figures — Smart Fortwo (450)

150 hvac & comfort 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.

Service manual page showing AC leak test steps and condensation drain hose location on smart car. 450Location callout Air conditioning system leak test procedure for smart HVAC · p82 Service table showing AC leak detector inspection steps 9-13 and installation steps 14-17 with referenced part numbers 450 Air conditioning system inspection procedures for expansion HVAC · p83 Service manual page showing air distribution cable removal steps with two black and white photos and detailed procedure table. 450Location callout Air distribution cable removal and installation procedure HVAC · p92 Service procedure photos showing air recirculation box, cable, connector, and control unit N26 on smart fortwo 450 chassis. 450Location callout Air recirculation unit removal and installation procedure HVAC · p93 Service manual page showing blower motor location, electrical plug, and two mounting bolts with callout labels. 450Location callout Blower motor removal and installation procedure for chassis HVAC · p97 Service procedure table with numbered steps 29-37, part numbers, and torque specifications for smart fortwo 450. 450Torque table Assembly procedures and torque specifications for front HVAC · p120 Service manual page showing heater control cable removal steps with two technical photos and detailed procedure table. 450Location callout Smart Fortwo 450.3/4 heater control cable HVAC · p128 Three photographs showing blower resistor location and electrical connector on dashboard with numbered callouts. 450Location callout Heater blower motor series resistor (R14) removal and HVAC · p133 Service manual page showing AC compressor removal steps, torque specs table, and four labeled engine compartment photos. 450Torque table AC compressor removal procedure with torque specifications HVAC · p148 Service manual page with four photographs showing combination air filter location and installation process, numbered callouts 1-5. 450Location callout Combination filter replacement procedure for smart fortwo HVAC · p152 Service manual table with numbered installation steps for auxiliary heater components and sub-steps with notes and part references. 450Location callout Auxiliary heater installation service procedure steps 5–31 HVAC · p160 Diagram of heater/AC control panel with labeled switches and sensors for smart fortwo 451. 450Schematic Heater/AC operating unit components and control functions HVAC · p320 Text describing air recirculation flap closure and blower switch intensity settings. 450 HVAC air recirculation flap and 4-stage blower switch HVAC · p321 Engine bay photo showing refrigerant compressor location and removal procedure with numbered callouts. 450Location callout Remove/install refrigerant compressor for Smart fortwo 451 HVAC · p334 Torque specification table for AC compressor bolts and refrigerant lines 450Torque table Refrigerant compressor torque specifications for Smart HVAC · p335 Service manual page showing three engine bay photos with numbered callouts and detailed A/C compressor removal procedure table. 450Exploded view Air conditioning refrigerant compressor removal and HVAC · p336 Engine bay photo showing radiator unit with numbered callout points 10, 11, 12; disassembly steps table below. 450Location callout Smart 451.3 air conditioning radiator unit removal HVAC · p343 Service procedure table for AC leak testing with photo showing condensation drain hose location. 450 Air conditioning system leak test procedure for model HVAC · p430 Table showing AC refrigerant service procedures with reference part numbers for left and right-hand drive vehicles. 450Schematic Service procedures table for air conditioning refrigerant HVAC · p431 Service manual page showing filter cover removal and combination filter replacement steps with numbered callouts. 450Location callout Combination filter replacement procedure for 451 chassis HVAC · p435 AC drain pipe visible through fog light opening with red outline; lower image shows drain pipe access point near fog light housing. 450 Air conditioning drain pipe location and maintenance HVAC · p447 Smart car dashboard showing selector knob (A) for activating outside temperature display feature. 450 Air Conditioning Plus system overview with outside HVAC · p448 Owner manual text describing AC system operation with photo of dashboard control button. 450 Air conditioning plus system operation modes and selector HVAC · p449 Air conditioning system re-gas guide showing high-pressure valve, low-pressure port, and refill canister for Smart fortwo models. 450 Air conditioning re-gas procedure for Smart fortwo HVAC · p450 Six instructional photos showing heater selector removal from Smart Roadster dashboard and cable routing details. 450Location callout Smart Roadster heater selector control removal and HVAC · p554 Seat heater switch showing labeled buttons A and B for driver and passenger seat heating control. 450 Seat heater control switch with driver (A) and passenger HVAC · p555 Heater resistor removal steps showing connector disconnect, lug alignment, and resistor components. 450 Heater resistor removal and replacement procedure for Smart HVAC · p556 Text and photos showing heater control slider replacement methods and custom aluminum slider fabrication steps. 450 Heater control slider repair options and DIY aluminum tang HVAC · p559 Dashboard heater controls with rotary air nozzles, blower switch settings, and interior air flow diagram. 450 Heater and ventilation controls, air nozzle adjustment HVAC · p561 Diagram showing air recirculation and fresh air intake positions, electric heater booster controls, and rapid cooling vents. 450 HVAC fresh air circulation modes and electric heater HVAC · p562 Dashboard showing heater controls labeled A, B, C with instructions for rapid heating and deicing procedures. 450 HVAC blower, air distribution, and heater controls for HVAC · p563 Text instructions for operating outside mirror heaters, including activation via rear window heater switch. 450 Outside mirror heaters operation and activation procedures HVAC · p638 Dashboard stowage compartment showing AUX jack location between steering column and center console. 450 Smart Sound Package audio system with additional speakers HVAC · p673 Control panel showing rear window heater switch with four buttons and operating instructions. 450 Rear window heater control panel with switch location and HVAC · p815 Two photos showing washer fluid tubing being routed under engine cover and secured with clips near wiper base. 450 Windshield washer fluid pipe routing and clip securing HVAC · p831 Troubleshooting guide for heater blower issues and resistor pack replacement with photos of component removal. 450 Heater blower failure diagnosis and resistor pack removal HVAC · p888 Service manual page showing how to replace the pollen/charcoal filter in a Smart car with three instructional photographs. 450 Pollen/charcoal filter replacement procedure with HVAC · p892 Engine compartment showing air filter element location with numbered callouts and removal instructions. 450Location callout Air filter element replacement procedure for 451 engine Cabin air filter · p298 Exploded view diagram showing AC filter cover, screw, and combination filter assembly with numbered callouts. 450Exploded view Air conditioning combination filter replacement procedure HVAC · p2413 Exploded view of air recirculation box, flap actuator motor, and heater/air conditioner housing with numbered callouts. 450Exploded view Air recirculation unit components and removal/installation HVAC · p2418 Diagram showing flexible shaft connected to heater/AC operating unit with numbered callouts and removal steps. 450Location callout Flexible shaft and heater/AC operating unit (N23) HVAC · p2419 Service manual pages showing fresh-air intake removal steps and exploded view of intake assembly with gasket. 450Location callout Fresh-air intake removal and installation procedures for HVAC · p2421 Diagram showing heater/AC unit N23 with numbered callouts for cable, bracket, and catch hooks; removal steps listed below. 450Exploded view Heater/AC operating unit (N23) components and removal HVAC · p2424 Exploded diagrams of heater/AC unit N23 showing air distribution lever, temperature control, fan speed lever, and component removal steps. 450Exploded view Heater/ventilation operating unit N23 components and HVAC · p2425 Service manual page showing heater/AC unit removal steps and component identification diagram. 450Location callout Heater/AC operating unit (N23) removal and installation HVAC · p2426 Seven-step service procedure table with snap clamp and coolant hose location diagrams for heater unit removal. 450Location callout Heater housing removal and installation procedure for 451 HVAC · p2427 Six detailed photographs of heater housing assembly with numbered labels identifying components like snap clamps, coolant hoses, and electrical connectors. 450Exploded view Heater housing components identification with numbered HVAC · p2428 Heater AC operating unit N23 with numbered component callouts and step-by-step removal instructions. 450Location callout Air conditioning control and operating unit components HVAC · p2431 Diagram showing heater/AC unit components and removal steps for smart fortwo model 451 450Location callout Model 451.3/4 heater/AC operating unit (N23) removal and HVAC · p2432 Three photos showing blower motor lock, connector, and motor position; removal/installation procedure table below. 450Location callout Model 451.3/4 blower motor removal showing lock, electrical HVAC · p2433 Three photos showing blower motor resistor group R14 location and electrical connector in vehicle interior. 450 Blower motor series resistor group R14 and electrical HVAC · p2434 Four-panel diagram showing AC cap location, refrigerant lines, service unit, and engine compartment connections with numbered callouts. 450Location callout Air conditioning system cap, refrigerant line, service unit HVAC · p2437 Four detailed photos showing air conditioner housing parts with numbered callouts 1-8 and B12 on smart 451 chassis. 450Exploded view Air conditioning system housing components identified on HVAC · p2439 Six black and white photos showing AC housing parts with numbered callouts and component labels. 450Exploded view Air conditioner housing components identification, parts HVAC · p2440 Service procedure table for AC housing removal with callout diagram showing refrigerant sensor location 450Location callout Air conditioning housing replacement procedure steps 23–28 HVAC · p2443 Air conditioning system components diagram for smart 451 with expansion valve, refrigerant lines, and bolts identified. 450Exploded view MODEL 451.3/4 air conditioning expansion valve, refrigerant HVAC · p2445 Engine bay and engine compartment photos showing AC valve element location with numbered callouts 1-3. 450Location callout Identifying valve element, suction pipe and pressure line HVAC · p2447 Technical diagram showing valve element, suction pipe, pressure line location, and valve wrench tool. 450Location callout Condenser filling valve removal and valve wrench HVAC · p2448 Valve wrench tool diagram and AC system component identification on smart fortwo with callout labels. 450Location callout Valve wrench tool (203 589 03 10 00) and AC dehydrator HVAC · p2450 Labeled diagrams of AC filter drier assembly with callout numbers 4-9 identifying parts and tools. 450Exploded view Filter drier, front CBS, screws, cover and circlip HVAC · p2451 Diagram showing capacitor, refrigerant line, nut and catch locations on AC condenser with safety warnings. 450Exploded view AC system capacitor, refrigerant line, nut and catch HVAC · p2453 Four photos showing refrigerant compressor lines and components with numbered callouts on smart 451 chassis. 450Exploded view Refrigerant line components at compressor for 451.3/4 Air HVAC · p2454 Diagram showing refrigerant line routing and components in smart car AC system with 18 numbered callouts. 450Exploded view AC refrigerant line components between compressor and HVAC · p2457 Underbody frame bolts, removal assembly, mount, and cutting tool set for smart 450/451/452 refrigerant service. 450 Underbody frame bolt specifications and refrigerant line HVAC · p2460 Three engine bay photos showing numbered callouts for AC components: refrigerant lines, capacitor, expansion valve, and mounting nuts. 450Exploded view AC condenser refrigerant line, capacitor, expansion valve HVAC · p2461 Labeled diagram showing refrigerant lines, brackets, radiator unit, and pressure sensor locations. 450Exploded view AC refrigerant line components and locations on smart 451 HVAC · p2463 Three photos showing smart car exterior and undercarriage views of AC compressor mounting location with callout labels. 450Location callout AC refrigerant compressor (A9) location and bolt attachment HVAC · p2468 Service manual page showing refrigerant compressor location and components with safety warnings for chassis 451. 450Location callout Refrigerant compressor removal/installation procedure for HVAC · p2469 Modification notes table showing refrigerant capacities and ventilation system diagram with airflow arrows on dashboard. 450Location callout Air conditioning refrigerant filling capacity HVAC · p2475 Diagram showing blower motor M2 location under instrument panel and in air conditioning housing. 450Location callout Blower motor location and component description for Smart HVAC · p2477 Three photographs showing actuator motor components labeled M168 and M39 used in heating and air conditioning systems. 450 Air recirculation flap actuator motor M39 and blend air HVAC · p2478 Dashboard view pointing to heat exchanger location; undercarriage photo showing heat exchanger component mounted below. 450 Heating system heat exchanger location in left front HVAC · p2480 Refrigeration cycle schematic with colored lines indicating high and low pressure circuits and component locations. 450Schematic Refrigeration cycle function diagram for model 451 air HVAC · p2485 Technical diagram showing condenser capacitor location on smart fortwo 451 chassis, front-mounted behind radiator grille. 450 Air conditioning condenser location and component HVAC · p2488 Evaporator component diagram showing location in AC housing with detailed view of cooling fins 450 AC evaporator location and function for Smart 451.3/4 with HVAC · p2489 Dashboard heater/AC unit labeled N23 with temperature and air controls; lower console panel showing switches S98/1 and N23s1. 450Location callout Heater/AC operating unit components for 451/3/4 chassis HVAC · p2491 Dashboard heater and air conditioning control panel with labeled switches and components for Smart 451. 450Schematic Heater/AC operating unit components for model 451.3/4 with HVAC · p2492 AC wiring schematic with relays, switches, and component connections labeled with wire gauges. 450Wiring diagram Air conditioning system wiring diagram (1 of 2) showing HVAC · p2499 Electrical schematic diagram of AC system with labeled components and wiring connections. 450Wiring diagram Air conditioning electrical function diagram showing HVAC · p2502 Two cutting tools and valve wrench for Smart AC service procedures. 450Exploded view AC cutting tool set (452 589 00 33 00) and valve wrench HVAC · p2504 Technical drawing of a valve wrench tool with part number 203 589 03 10 00 labeled below. 450 Valve wrench tool 203 589 03 10 00 identification for Smart HVAC · p2505 Step-by-step diagram identifying combination filter cover and screw locations on smart car AC system. 450Location callout Combination filter replacement procedure for model 451.3/4 HVAC · p2508 Exploded view diagram showing air recirculation unit parts with numbered callouts and component labels. 450Exploded view Air recirculation unit components for chassis 451.3/4 HVAC · p2513 Service manual page showing heater/AC unit removal steps and exploded view diagram with labeled components. 450Location callout Model 451 heater/AC operating unit flexible shaft removal HVAC · p2514 Three-panel diagram showing blend air flap actuator location, electrical connector, and mounting bolts on Smart 451 HVAC system. 450Location callout Blend air flap actuator M16/8 removal and installation HVAC · p2516 Four-panel diagram showing heat exchanger location and component identification in Smart 451 vehicle interior. 450Exploded view Heat exchanger removal and installation procedure for Smart HVAC · p2518 Service procedure steps 7-13 for heater heat exchanger and control cable with exploded component diagram. 450Exploded view Heater heat exchanger removal, installation, and control HVAC · p2519 Service procedure steps and labeled photographs showing heater/AC unit components and removal sequence. 450Exploded view Heater/AC operating unit (N23) removal and installation HVAC · p2520 Diagram showing heater/AC unit components N23, flexible shaft, and removal/installation steps with callouts. 450Location callout Heater/AC operating unit N23 removal and installation HVAC · p2522 Two technical diagrams showing heater housing parts with numbered callouts on smart 451 chassis. 450Exploded view Model 451 heater housing components identification with HVAC · p2523 Exploded views of heater housing assembly with numbered callouts and step-by-step removal instructions. 450Exploded view Heater housing component identification and HVAC · p2524 Technical diagram showing heater/AC unit components N23 with numbered callouts and four detail photos of installation locations. 450Exploded view Air conditioning control and operating unit components for HVAC · p2526 Diagram showing heater AC unit N23 with numbered callouts and step-by-step removal instructions. 450Location callout Heater/AC operating unit N23 identification with screw HVAC · p2528 Technical diagram showing blower motor location, electrical connector, and lock with six-step removal procedure. 450Exploded view Blower motor, electrical connector, and lock identification HVAC · p2529 Service manual page showing blower resistor removal steps and AC condensation drain hose identification photos. 450Location callout Blower motor resistor removal and air conditioning HVAC · p2530 Four photographs showing engine bay cap location, refrigerant line connections, AC service unit, and compressor connections. 450Location callout AC system cap, refrigerant lines, service unit connection HVAC · p2533 Two multi-panel technical diagrams showing AC housing parts with numbered callouts and component labels. 450Exploded view Air conditioner housing components identified with numbered HVAC · p2538 Four black and white photos identifying AC housing parts with numbered callouts 9-23 and component M39. 450Exploded view Air conditioner housing components identification with four HVAC · p2539 Expansion valve diagram with refrigerant lines, bolts, and AC pressure sensor for smart 451.3/4 chassis. 450Exploded view Air conditioning expansion valve removal/installation HVAC · p2543 Diagram showing AC valve element, suction pipe, and pressure line for Smart 451 model with front view locator. 450Location callout Air conditioning intake manifold filling valve components HVAC · p2545 Diagram showing condenser valve parts and their locations on Smart car engine bay and front. 450Location callout Condenser filling valve components: valve element, suction HVAC · p2547 Four photos showing dashboard controls and engine bay AC component locations with numbered callouts. 450Location callout Identifying condensation drain, spray probe and rotary HVAC · p2549 Exploded diagram showing filter drier assembly, CBS unit, fasteners, and AC system components with numbered callouts. 450Exploded view Filter drier, front CBS, screws, cover and circlip HVAC · p2552 Service procedure table and condenser component identification diagram with numbered callouts. 450Location callout Air conditioning condenser removal procedure steps 3-10 HVAC · p2553 Four photographs showing refrigerant compressor components with numbered callouts and labels. 450Exploded view Refrigerant lines at AC compressor components with numbered HVAC · p2555 Labeled diagram showing refrigerant compressor-evaporator lines and specialized cutting tool set with part number. 450Location callout Refrigerant line components and cutting tool set (452 589 HVAC · p2557 Three photos showing refrigerant line locations and related AC components on smart vehicle. 450Location callout Refrigerant line between refrigerant compressor and HVAC · p2558 Three photographs showing refrigerant lines, capacitor, nuts, expansion valve locations on smart 451 AC system. 450Location callout Refrigerant line components and identification for smart HVAC · p2561 Smart car with close-up photos of refrigerant compressor A9 and oil pan bolt locations underneath vehicle. 450Location callout Cylinder crankcase refrigerant compressor and oil pan bolt HVAC · p2569 AC compressor location and components on smart 451, with numbered callouts and safety warnings for refrigerant handling. 450Exploded view Refrigerant compressor removal and installation procedure HVAC · p2570 Specifications tables for AC refrigerant capacity and diagram showing heater/AC operating unit location on 451.3/4 dashboard. 450Exploded view Air conditioning refrigerant filling capacities and HVAC · p2576 Two photographs showing blower motor under instrument panel and interior climate control panel for Smart 451. 450Location callout Blower motor location and identification for Smart 451 air HVAC · p2578 Three component photographs showing M168 blend air actuator, M39 recirculation motor, and their mounting location. 450 Blend air flap actuator M168 and air recirculation flap HVAC · p2579 Dashboard pointer and underhood heat exchanger component images. 450 Heating system heat exchanger location in left front HVAC · p2581 Smart car with callout boxes identifying heater system components: heat exchanger, blower motor M2, blend air flap actuator M16/8, SAM control unit N10/10, and heater/AC operating unit N23. 450Exploded view Automatic heater (HEAT) component locations for Smart HVAC · p2582 Smart car 451 HVAC system components overview showing blower, compressor, sensors, and control units locations. 450Schematic Automatic heater and air conditioning system component HVAC · p2584 Schematic diagram of AC refrigeration cycle with color-coded pressure circuits and labeled components. 450Schematic Air conditioning refrigeration cycle function diagram HVAC · p2587 Diagram showing condenser component and its location on smart fortwo front end. 450 AC condenser location and function for smart fortwo 451 HVAC · p2590 AC evaporator core and expansion valve location diagrams for Smart ForTwo 451 model. 450Exploded view Evaporator and expansion valve identification for Smart HVAC · p2591 Dashboard photo showing heater controls N23, S98/1, and numbered callouts 1, 2 in center console. 450Location callout Heater/AC operating unit components location center console HVAC · p2593

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