Is there a problem with the BlueTec diesel engine?
All models that were equipped with the 3.0L V6 diesel engine, engine code OM642, can be affected by this problem. This includes “CDI” and “BlueTEC” models alike. A full list of affected vehicles is below:
What causes an oil cooler to leak on a Mercedes?
Once the seals start to leak slowly the rate of leak will increase very fast. You may not initially get oil stains when parked as Mercedes models come with a fairly large undercarriage cover (aka belly pan) that can collect a significant amount of oil before it leaks over.
Can a diesel engine have an oil cooler leak?
The Achilles heel of this engine, unfortunately, is the oil cooler seal design. We’ll go over which vehicles are affected, the signs and symptoms plus let you know what to expect on a repair. All models that were equipped with the 3.0L V6 diesel engine, engine code OM642, can be affected by this problem.
What kind of exhaust fluid does BlueTEC use?
All Bluetec vehicles use Diesel exhaust fluid, also known as AdBlue. It is stored in an external tank, and it would freeze in cold weather. To prevent this, DEF tank is equipped with an electric heater which can burn out. You will be warned with a ‘check engine’ light if this happens.
Why does my Bluetec engine have an oil leak?
The combination of 130,000kms, oil cooler leakage and oil return for the turbo leaking in a large SUV in fact suggests driver operation under heavy loading for extended periods. It’s clear you either drive it like a commercial truck or a rally car, routinely sending oil and impeller temperatures through the roof during normal operation.
Which is the best Mercedes E320 Bluetec Diesel?
I think the W211 is best in the E320 BlueTec form. If you can find a clean, maintained, and documented E320 BlueTec it will be a good decision. There are more modern diesels, but this is the last of the V6 diesels that do not require AdBlue.
What causes soot build up in Mercedes engine?
Wrong engine oil can cause excessive soot build up. Luckily, the regeneration process can be initiated manually, using an appropriate diagnostic tool. In most cases, this will purge a clogged DPF. Mercedes, like many diesel cars, uses a DPF Exhaust Pressure Sensor to determine how much does the DPF restrict the exhaust flow.
All Bluetec vehicles use Diesel exhaust fluid, also known as AdBlue. It is stored in an external tank, and it would freeze in cold weather. To prevent this, DEF tank is equipped with an electric heater which can burn out. You will be warned with a ‘check engine’ light if this happens.