E280 / E320 CDI 3.0 V6 (OM642)
2005–2009 · diesel · 2987cc · 224hp
Engine codes: OM642
Reliability, common problems and owner reviews for the Mercedes Benz E-Class W211 E280 / E320 CDI 3.0 V6 (OM642). Check this before you buy used.
The 3.0 V6 CDI became the most problematic diesel of this generation: frequent injector failures, EGR problems, and two signature expensive jobs — the oil cooler seal leak (labour-heavy, between the V) and the intake swirl-motor/runner failure. Strong when sorted, but budget for these known repairs.
Same engine, other cars
This is the same physical engine (OM642) sold under different names across brands. Reliability is broadly shared — cross-check these:
- Mercedes-Benz GLK— 320/350 CDI 3.0 V6 (OM642)224hp
- Mercedes-Benz Vito / Viano— 3.0 CDI V6 (OM642)224hp
- Jeep Grand Cherokee— 3.0 CRD V6 (OM642, Mercedes)218hp
- Mercedes-Benz M-Class (ML)— ML350 CDI 3.0 V6 (OM642)258hp
- Mercedes-Benz M-Class (ML)— ML280/320/350 CDI 3.0 V6 (OM642)224hp
- Mercedes-Benz C-Class W204— C320 / C350 CDI 3.0 V6 (OM642)224hp
Known Issues
Oil cooler seals leak oil over the engine — labour-intensive (intake off).
Fix / Workaround: Replace oil cooler seals with updated parts.
Repair cost: €500–€1200
Typically appears after: 120,000 km
Frequent injector failures on the OM642.
Fix / Workaround: Replace failed injectors (expensive).
Repair cost: €400–€1600
Typically appears after: 130,000 km
Intake swirl motor/runners fail → limp mode.
Fix / Workaround: Replace swirl motor / intake.
Repair cost: €300–€900
Mileage Thresholds
After 130,000 km: Oil cooler / injector / swirl issues cluster.
Pre-Purchase Checklist
- ☐Inspect for oil cooler leak
- ☐Scan for injector codes
- ☐Check swirl motor / limp mode
- ☐Budget for known repairs
Frequently asked questions
Is the Mercedes Benz E-Class W211 E280 / E320 CDI 3.0 V6 (OM642) reliable?
Problematic — The 3.0 V6 CDI became the most problematic diesel of this generation: frequent injector failures, EGR problems, and two signature expensive jobs — the oil cooler seal leak (labour-heavy, between the V) and the intake swirl-motor/runner failure. Strong when sorted, but budget for these known repairs.
What are the common problems and reviews for the Mercedes Benz E-Class W211 E280 / E320 CDI 3.0 V6 (OM642)?
The most commonly reported problems: Oil cooler seal leak, Injector failure, Swirl motor / intake runner.
Is a used Mercedes Benz E-Class W211 E280 / E320 CDI 3.0 V6 (OM642) worth buying?
Known design issues and recurring faults that were never fully resolved. Buy only with eyes open.