453 2015–2024 3rd-gen Fortwo

2015–2024 Smart Fortwo (453)

Gas (1.0L 3-cyl) or 0.9L turbo, RWD, manual or twinamic DCT — plus a 453 EQ electric variant

Is this you? If your Smart was sold from 2015 onward, has a real automatic instead of the old jerky single-clutch, and the engine sits behind the rear seats, you're in the right place.

Jump to manuals & downloads ↓ First 30 days checklist

About this generation

The 453 is the third (and last) generation of the gas Fortwo, and the one most North American buyers are picking up used today. Built in Hambach, France, on a platform Mercedes co-developed with Renault — the Forfour twin lives in Renault's Slovenian plant — it's lighter on its feet than the 451 it replaced, finally has a proper dual-clutch automatic that doesn't lurch between shifts, and is genuinely pleasant to drive in town.

It's also still a Fortwo. That means small. Two seats. 8.8-foot turning radius that lets you U-turn in a single-lane street, but also a wheelbase shorter than a wheelchair-accessible van. It's superb for parking, errands, and a daily commute under 50 miles. It's a poor highway road-trip car, a poor cargo car, and a poor anything-with-three-people car. Buy it knowing what it is, not what you wish it were.

The good news: 453s are reasonably cheap to keep alive if you stay ahead of the maintenance and learn the chassis-specific quirks. Brakes, fluids, filters, spark plugs — all owner-friendly. The bad news: a few items (twinamic DCT service, early-build OCS passenger-seat sensor faults, M281 valve-cover oil seepage feeding cylinder-3 misfires) need a Smart-experienced shop. The mechanic directory and the AI mechanic on this site exist precisely because dealer service for these cars dried up when smart left North America in 2019.

If you bought one and you're feeling a little stranded — that's the right reason to be here. This page is the on-ramp. Everything below is owner-tested, sourced from forums and the workshop manual, and links straight to the deep references when you need to go further.

Quick specs

Engine options
  • 1.0L M281 3-cylinder (naturally aspirated, 71 hp / 68 lb-ft) — US-spec base
  • 0.9L M281 turbo 3-cylinder (89 hp / 100 lb-ft) — US-spec optional, EU standard
  • 0.6 / 0.7L 3-cyl (EU/Asia diesel, JDM Kei variants — not US)
  • Electric drive (453 EQ): 17.6 kWh, 80 hp, ~58 mi (US EPA) / ~99 mi (WLTP)
Gearbox
5-speed manual or 6-speed twinamic DCT (Getrag 6DCT150, dual-clutch). The 451's old single-clutch is gone — twinamic is a real automatic.
MPG / Range
32–39 MPG combined (gas) · ~58 mi EPA range (453 EQ)
Length
8 ft 10 in (2,695 mm) — same Tridion safety cell footprint as the 450 and 451
Weight
1,940–2,150 lb (880–975 kg) depending on trim
Fuel
Premium unleaded (91 octane) for both gas variants — Mercedes-spec, not optional
Built in
Hambach, France (Fortwo) · Novo Mesto, Slovenia (Forfour, Renault plant)
Seats
2 (Fortwo) / 4 (Forfour, EU/UK only)
Cargo
9.2 ft³ behind the seats, ~12 ft³ with the seatback folded flat
Safety
Tridion safety cell, dual front airbags, knee airbag, side curtains, crosswind assist standard from 2017

Downloads & resources

The manuals, diagrams, and quick references that ship with this chassis. PDFs open in a new tab; on-site pages are owner-to-owner walkthroughs.

Manuals Owner's Manual (US, 2016) · PDF · 234 pp Introduction into Service Manual · PDF · 122 pp Workshop Manual · PDF · 4,180 pp
Diagrams Fuse Allocation Diagram · PDF · 4 pp Fuse Box Layout — owner-to-owner walkthrough
Reference Smart Media (Touchscreen) Guide · PDF · 77 pp Standard Radio Guide · PDF · 42 pp Fluids & Capacities reference Maintenance Schedule Pre-Purchase Inspection Checklist

Missing a manual you'd expect to see? Email us — if it exists, we'll add it.

Trims & variants — what each one meant

Smart's trim names look interchangeable across generations, but they mean slightly different things on each chassis. Here's what the labels actually got you on the Fortwo (453).

  • Pure

    Base trim. Steel wheels, manual A/C, cloth seats, plastic body panels in body color. The 'I just need a Smart' option. EU/UK only — North America didn't get Pure trim.

  • Passion

    Mid-trim and the most common 453 in North America. Alloys, automatic climate, leather wheel, cruise. The default 'comfortable Smart' spec.

  • Prime

    Top trim short of Brabus. Heated leather, panoramic roof glass, ambient lighting, premium audio. About 60% of US Cabrios came as Prime.

  • Proxy

    EU-only sport trim between Passion and Brabus. Brabus-look bodykit and seats, regular drivetrain. Rare in North America by import only.

  • Brabus

    The factory hot-rod. Same 0.9L turbo (no extra power on US-spec; EU got the 109 hp tune), but with sport suspension, Brabus wheels, badges, exhaust note, and interior trim. Driving feel is meaningfully sharper. US Brabus production was tiny — ~500 units total across all years.

  • Brabus Xclusive

    Brabus with leather everywhere and the highest specification. EU-mostly. If you find one in North America, it's been imported.

The first 30 days

If you just bought a Fortwo (453), this is the order to do things in. Stay ahead of these and you'll save yourself a lot of money.

  1. Drive the twinamic the way it wants to be driven

    The 453 has a real dual-clutch automatic, not the 451's single-clutch. Treat it like one: ease off the throttle just before upshifts at part throttle so the trans can pre-engage the next gear smoothly. If you mash and hold, it'll still upshift — but the 'D' creep mode at slow speeds (parking lots, stop-and-go) is where dual-clutches are weakest. If you feel ragged shifts in traffic, that's normal DCT behavior, not a fault. P0741 (torque-converter clutch) and harsh shifts in early-build cars are a separate issue — see Common Problems below.

  2. Confirm fluid levels and quality

    Engine oil (Mercedes 229.51 spec, 0W-30 or 5W-30), coolant (Mercedes 326.0 spec, ~5L total), brake fluid (DOT 4), and twinamic gearbox oil. The twinamic uses Mercedes-spec MB 236.21 — there are 'lifetime fill' claims, but owners with 80k+ mi report smoother shifts after a service. See [DCT service](/maintenance/dct-service-453/).

  3. Find the service history

    Ask the seller for the maintenance booklet or pull a CARFAX. Watch for missed 10k oil intervals, missing brake fluid flush, no DCT service. If the prior owner skipped maintenance, you'll inherit the bills. If service was done at a Mercedes dealer, the records will be on Mercedes's online system — a Mercedes service writer can pull it up by VIN.

  4. Register for recall alerts

    Plug your VIN into [nhtsa.gov/recalls](https://www.nhtsa.gov/recalls) and into Mercedes-Benz USA's recall lookup. The 453 has had recalls for fuel pumps, airbag inflators, and a couple of body items. Recall repairs are free at any Smart-authorized Mercedes dealer regardless of how many owners back the campaign was issued.

  5. Find an indie before you need one

    Smart left North America in 2019. Not every Mercedes dealer wants to work on Smarts anymore — some still do, some quietly don't. The independent specialist network (Cosmic Cabrios, the shops on the [Mechanic Directory](/mechanic-directory/)) is who keeps these cars on the road today. Find your two or three best options on a map before something breaks.

  6. Read your specific Owner's Manual

    It's 234 pages and most of it is genuinely useful — especially the dashboard symbols, the maintenance schedule, and the seat-occupancy / airbag system notes. The PDF link is in Downloads & Resources above.

  7. Take a baseline scan

    A cheap iCarsoft V4.0 or a Foxwell NT530 reads Smart-specific modules (engine, transmission, ABS, SAM, airbag/SRS) the way a generic OBD2 reader can't. Pull all module faults once, save the report, and you have a starting point to compare against later. Generic OBD code lookups will mislead you on this car — Smart-specific tools are worth the $200.

Join the communities

Smart left North America in 2019. The communities below are how owners keep these cars on the road today — tribal knowledge, shop recommendations, parts swaps. Join two or three and lurk for a week before posting.

Global

  • Evilution.co.uk Forum

    The deepest enthusiast-run Smart resource on the web — hundreds of code-by-code DIY breakdowns. UK-based but covers all chassis. Worth subscribing.

  • smartcarforums.com Forum

    Long-running multi-region forum. Slower than Reddit but the search index is gold for older threads.

  • @SmartCarVideos (this site) YouTube

    670+ curated videos organized by generation and job type — the playlist library that goes with smartcarmanuals.com.

  • Evilution YouTube YouTube

    Companion channel to the website. Concise, hands-on, no filler.

  • Smart E.R. YouTube

    Practical owner-friendly tips, repairs, and reviews — heavy on Fortwo and Forfour.

North America

  • Smart Car of America Forum

    The North-American-skewed forum. Slightly quieter post-2019 but still active for buying/selling and US-specific recall threads.

  • r/smartcar Reddit

    Mixed-region subreddit, but heavily US/Canada owner traffic. Good for quick gut-checks on a problem.

  • Smart Car USA Owners (Facebook) Facebook

    Login required, worth it. Active US owner group with tribal knowledge for state-specific shop recommendations.

  • Smart Car Owners Canada (Facebook) Facebook

    Login required, worth it. Specifically Canadian — winter tire setups, customs questions, importing from US.

UK & Europe

  • smart-club.co.uk Forum

    UK-focused, founded around the early 450s but covers all chassis. Strong technical archive.

  • Smart Car Owners UK (Facebook) Facebook

    Login required, worth it. UK indie shop recommendations and Brabus/Cabrio enthusiast posts.

  • Smart 453 Owners (Facebook) Facebook

    Login required, worth it. The Europe-skewed 453-specific group — most direct match for this page.

Australia

Watch this stuff before you wrench

A handful of videos that'll save you an afternoon — @SmartCarVideos first, then the deep enthusiast channels.

Browse the full Video Library →

Top maintenance items

The owner-friendly jobs that keep this chassis running. Each card is a deeper guide on this site.

Engine oil & filter change

View guide →

Spark plug replacement

View guide →

Auxiliary 12V battery (453-specific)

View guide →

Twinamic DCT service

View guide →

Brake pad replacement

View guide →

Cabin air filter

View guide →

Browse all maintenance guides →

Common problems & what to watch

The things that actually fail on this chassis. Cards link to deep guides with cheap-first checks and parts pricing.

P0303 cylinder-3 misfire — valve-cover oil leak fouling the coil

DIY first

Diagnose code →

P0741 — torque-converter clutch / DCT clutch fault

Shop

Diagnose code →

P0128 (with harsh shifts) — thermostat + DCT relearn pattern

DIY first

Diagnose code →

B00A068 — passenger occupant weight sensor fault

Shop

Diagnose code →

B152014 — F2K5 starter relay short in the SAM

Shop

Diagnose code →

Browse all fault codes →

Recalls

Recall repairs are free at any Smart-authorized Mercedes dealer regardless of how many owners back the campaign was issued. Look up your VIN below.

Outside the US?

The NHTSA database only covers US-market Smarts. For other regions:

Buying one? Look at these first.

Known weak points

  • M281 valve-cover oil seepage on the 1.0L. Oil works its way down to the cylinder 3 ignition coil and triggers a P0303 misfire. Pull the engine cover and look for shiny oil around the cam-cover gasket. ~$30 part, ~1 hr DIY if caught early.
  • Twinamic DCT teething (early build). 2016–2017 builds were prone to harsh shifts at low speed and occasional P0741 torque-converter clutch faults. Most resolved with a software flash + relearn at the dealer; some needed a full mechatronic rebuild. Test-drive specifically: stop-and-go from 5–15 mph, smooth roll-off, both directions on a slope. If the car shudders or hesitates audibly, that's the fault — not normal DCT behavior.
  • Passenger occupant sensor (OCS) cluster faults. B00A068 / B00A07B / B00A096 surface together when the passenger-seat weight pad fails. The airbag light stays on and the passenger airbag goes inactive. Replacement is a Smart-experienced shop job — the part is matched to the SRS module.
  • Auxiliary 12V battery aging. The 453's small AGM aux battery (yes, the gas car has one too — it powers the SAM, central locking, and start function) tends to die at 4–6 years. Symptoms: intermittent no-start, weird module errors on cold mornings, dash warnings that clear on a jump.
  • Convertible roof microswitches (Cabrio only). If the soft-top stops mid-cycle or refuses to operate, suspect the position microswitches or the roof control module before assuming a hydraulic failure. Cosmic Cabrios in the UK is the global authority on these — they ship parts internationally.
  • Premium-fuel requirement. Both gas variants require 91 octane premium. Running 87 won't immediately destroy anything, but the engine will pull timing and mileage suffers. Budget for premium across the life of the car.

Pre-purchase test drive checklist

  1. Cold-start the car yourself. The first 60 seconds tell you about misfires, lifters, and exhaust leaks.
  2. Drive in stop-and-go from 5–15 mph and pay attention to the DCT. Smooth = good; shuddering or hesitation = potential mechatronic issue.
  3. Climb a 5%+ grade from a stop. The DCT should engage smoothly without a long slip.
  4. On a Cabrio: cycle the roof open and closed at least twice. If it pauses, slows, or won't fully cycle, walk away or budget for repair.
  5. Pop the engine cover and look for oil sheen around the valve cover and on the coil packs. Oil there means a P0303 is coming.
  6. Press hard on each fender and the front trunk lid. Listen for creaks — Tridion mounts and body bushings can wear.
  7. Plug in an iCarsoft V4.0 or Foxwell NT530 and pull all modules. Stored history codes tell you what the seller cleared.
  8. Cycle through every electrical accessory: windows, mirrors, A/C, all four corner positions of the seats, both heated seats, the touchscreen, navigation if equipped.
  9. Check the auxiliary 12V battery date code (under the passenger floor on Fortwo). If it's 5+ years old, factor in a replacement.
  10. Verify the maintenance booklet or pull a CARFAX. Skipped intervals are the single biggest predictor of future bills on these cars.

Full PPI walkthrough →

Accessories & aftermarket

Pre-filtered searches at the big vendors. We don't take a cut on these clicks today — if you'd rather we did, tell us.

Find accessories: Top Amazon Finds ↗ Top eBay Finds ↗ Top AliExpress Finds ↗

Where to buy parts

Region-by-region. OEM via Mercedes is always available; the alternates below are owner-vetted.

United States

United Kingdom

European Union

Australia

Find a Smart-experienced mechanic

Curated directory of 130+ shops across the US, Canada, UK, and Europe that actually work on Smarts — not just every Mercedes dealer that took the franchise. The map is owner-recommended, vetted before listing, and updated as shops open and close.

Open the Mechanic Directory →

Stuck? Ask SmartDiag-AI.

Tell SmartDiag what your Fortwo (453) is doing — or paste a code. It'll work the cheap-first checks with you, weight likely causes against community-known patterns, and cite the workshop manual for each suggestion. The link below pre-fills your chassis.

Try SmartDiag-AI →

Frequently asked questions

  • Is the 453 the one with the jerky transmission?
    No — that's the 451. The 453 has the twinamic dual-clutch automatic, which is a real automatic transmission and shifts smoothly under most conditions. Early-build (2016–2017) cars had some software-related harsh-shift complaints that were largely fixed by a dealer flash. If a 453 you're considering still shifts harshly at slow speeds, ask if the latest software update has been applied.
  • Does it really need premium gas?
    Yes. Mercedes specifies 91 octane (or 95 RON in EU) for the 453's M281 engines, naturally-aspirated and turbo. Running 87 isn't catastrophic but the engine will pull timing and you'll lose 2–4 mpg. Just budget for premium.
  • Can I work on a 453 myself?
    Most owner-level maintenance — oil, filters, spark plugs, brake pads, cabin filter, aux battery — is straightforward. Where it gets harder: the engine sits behind the rear seats and underneath the rear cargo floor, so any deep engine work involves dropping the rear subframe. The twinamic DCT, the SRS / occupant-sensor system, and any timing-chain work are shop jobs unless you've done them on Smarts before.
  • Where do I buy parts in the US since the dealer network shrunk?
    Most Mercedes-Benz dealers can still order OEM Smart parts via the MB parts catalog — even if they don't service the cars anymore. Pelican Parts and FCP Euro stock Smart-specific items and ship fast. RockAuto is cheapest if you know exactly what you need.
  • Is the 453 EQ (electric) worth buying used?
    Honest answer: only if your daily round-trip is under 40 miles, you can charge at home, and you understand the battery degrades over time like any EV. The 58-mile EPA range was already short in 2017; on a 7-year-old example it's closer to 45–50 in summer and 35 in winter. Great for an in-town second car. Useless as a primary vehicle for most US buyers.
  • I've heard 'Smarts are unreliable.' True?
    Mostly false — for the 453 specifically. The 450 had real issues. The 451's CVT-like single-clutch was famously polarizing. The 453 is a different car: real Mercedes/Renault co-engineering, a proper DCT, and the chassis lessons of two prior generations baked in. Stay current on maintenance and learn the chassis-specific quirks above and a 453 will go 200,000+ miles without drama.
  • Will smart come back to North America?
    Probably not as the brand you bought. Smart in 2024+ is a Mercedes-Geely joint venture building Tesla-fighter SUVs (the #1 and #3) — completely different cars from the Fortwo you're driving. The Fortwo line ended production in 2024. Treat your 453 as the last of its kind.