Hey guys just wondering what probs i may encounter with a high mileage (89,000) 2007 ML320 cdi. this particular ml has some options i would like, just has the mileage as well, not sure how much of an issue this would be given that it's a diesel (engines generally thought to be durable).

 

IF you can Confirm the vehicle has been serviced Properly to date, and I mean all fluid changes in trans, motor etc, then the mileage wont be of concern, diesels are built for high mileage and I have personally logged over 400k on them.I plan on keeping my current ML diesel for at least 200k.I know people in Germany who have over 600k miles on one(a million plus kms) As with any used vehicle of any make or model, its all about its history.

 

These are probably the most durable diesels engines available. Keeping them fluid leak free is the main challenge. What does that mean? Well for starters, you'll want to keep the oil changed more frequently if you get one that is already leak free or has no active oil leak(s). I would suggest every 3,000- 4,000 miles. If you get one that is already leaking, I would suggest you start the fluid leak remediation journey by replacing all 6 injectors. Not only that, while you are that deep in the engine, change every hose, seal, gasket, and oil cooler. If you still have a oil leak after that ,you have a cracked engine.

 

89K miles in EU is considered "new"...but I would worry about the "2007" more than any mileage.

 

oil cooler gaskets(10hr job),
front diff(3-6hr job).
transfer case chain(2hr job)

those are the main problems,there is more with sam modules if water gets to them and stuff...