OM6462.1L Diesel
The OM646 is Mercedes-Benz's second-generation 4-cylinder CDI diesel, produced from 2002 to 2010 and used across the W211 E-Class, W203/W204 C-Class, W639 Vito and W906 Sprinter. It improved on the OM611 with reduced noise and emissions, and is generally regarded as one of the more reliable Mercedes diesels of its era despite the typical CDI injector and EGR concerns.
7
Fits chassis
2002–2010
Years built
170 hp
Power
Used to fully refurbished — quoted per unit
3-month parts warranty
Cover on every used part we dispatch.
Nationwide courier
Courier Guy & Aramex — door to door.
Fitment guaranteed
Send your VIN — we confirm before you pay.
Bench-tested
Inspected and tested before dispatch.
OM646 at a glance
| Displacement | 2.1L |
| Fuel type | Diesel |
| Power variants | 88 hp, 95 hp, 109 hp, 116 hp, 122 hp, 129 hp, 136 hp, 143 hp, 150 hp, 170 hp |
| Years produced | 2002–2010 |
| Replaces | OM611 |
| Replaced by | OM651 |
OM646 fits these 7 Mercedes chassis
Each card links to that chassis hub — full parts catalogue plus fitment notes.
- W2112002-2009E-ClassE200/E220/E280 CDIView parts
- W2032003-2007C-ClassC200/C220 CDIView parts
- W2042007-2008C-ClassC200/C220 CDIView parts
- W6392003-2010Vito/Viano109/111/115 CDIView parts
- C2092005-2009CLK-ClassCLK220 CDI
- CL2032008-2010C-Class Sport CoupeCLC220 CDI
- W9062006-2009Sprinter211/213/215/218 CDI
Common OM646 problems
We disclose every known fault before sale. Transparency is cheaper than a bad return.
- Bosch piezo injector failures with rough idle and increased fuel consumption
- Injector copper washer leaks causing 'black death' carbon build-up around injector base
- Variable geometry turbocharger sticking due to soot
- Swirl flap motor failure
- EGR valve and cooler clogging
- Crankcase breather/oil separator clogging
Featured parts for the OM646
No live OM646 listings right now
We strip 10–15 cars a month. Send your VIN and we'll WhatsApp you the moment one comes in.
OM646 rebuilds — what to budget
Bench-tested used long blocks start around R 30 000 delivered, full forensic rebuilds with new wear items run up to R 60 000. Final price depends on mileage, ancillaries (turbo, injectors, flywheel) and warranty tier — quoted per unit, no list-price surprises.
Send us your VIN — we'll match the right unit
We confirm engine number, ancillaries and warranty tier in writing before you pay.
Tell us about your Mercedes — we'll source the OM646
Three short steps. We reply within 2 hours during business hours with engine number, mileage, condition and a delivered price.
- Engine number confirmed against your VIN
- Bench-tested before dispatch
- 3-month warranty + nationwide courier
OM646 engine — common questions
Door-to-door courier from R 199
All major SA cities · 1–3 working days · Insured shipping on every order · Couriered from Centurion