OM648
Mercedes-Benz · 3.2L CDI Diesel I6
2002–2006
"Modern OM606 successor. Excellent highway cruiser. Strong torque."
Mileage Risk Timeline
When problems typically appear — enter your mileage to see your risk zone
Known Issues 2
EGR valve fouling (city use)
▸Rough idle, black smoke, reduced power
Standard CDI diesel EGR fouling. More likely with city-only driving.
Athens city use will accelerate EGR fouling. Highway driving helps. Budget €300-700.
Glow plugs + injector seals
▸Hard cold start, diesel smell, minor fuel weep around injectors
Same glow plug requirement as OM606. Injector copper seals harden and allow minor weep at high mileage.
Straightforward maintenance. Any Mercedes specialist in Greece handles this routinely.
Models with OM648 6
Other Mercedes-Benz Engines
Tuning Potential
Moderate
Frequently Asked Questions
Is the Mercedes-Benz OM648 reliable?
The Mercedes-Benz OM648 scores 90/100 with a verdict of BEST. It has 2 documented issues with total repair costs between €450 and €1,100.
What are the common problems with the OM648?
The most common issues are:
- EGR valve fouling (city use) — moderate, repair cost €300–€700, 80,000 km–160,000 km
- Glow plugs + injector seals — minor, repair cost €150–€400, 80,000 km–160,000 km
What cars use the Mercedes-Benz OM648?
How much does it cost to repair the OM648?
Total potential repair costs for all 2 known issues range from €450 to €1,100. The most expensive issue is typically .
What years was the OM648 produced?
The Mercedes-Benz OM648 was produced from 2002 to 2006. It is a 3222cc I6 diesel engine.
Verdict and scores are editorial opinions based on aggregated data. Learn about our methodology. Not a substitute for professional inspection.