Opinions on buying a W212




The OM642 engines are lovely performers, but unless you are very advanced DYI, few things they need down the road can cost you.
They are sold as 320 bluetecs and 350 bluetecs, Keep on reading in diesel section about them. Reserve few nights for the lecture.




It is actually the oil cooler seals that fail ($5 part), but require a 16 hour shop repair to get to them. I've done it on mine. Of course a dealer will want $2500 to do this. DIY was about $200 in parts, and about 20 hours w/o a lift.
Expensive Bluetec items to consider: Oil cooler seals, the Adblue tank heater, trans service every 39K miles, gunking up of the intake swirl vanes and motor, are the items I would want to check or consider for future expense.
There are DIY repairs for all of these, and an independent can do them for much less than a dealer.
Everything else is pretty standard maintenance. It's a great car with great economy, and massive torque is fun.
so regarding the oil cooler seals, if they have already been done, is that it sorted or does it have to be done regularly?
Here is my current service expectations then, please tell me if I’m wrong! -
* normal services as signaled by the dash display as standard routinely (probably including oil changes etc)
*transmission service every 39k




Oil cooler seals were updated and the new Viton seals should last forever.
Oil cooler seals were updated and the new Viton seals should last forever.
thank you so much for this detailed info!!
Can you verify where the work was done? In many cases, bodywork and paint is outsourced to someplace like Caliber Collision, Penske, etc. as dealers get out of the collision business. The shop may be "certified" as an MB repair center but the same guy working on your car was working on a Corolla last week. Nothing against Corollas, just making a point that these are broad-based service facilities. With that said, the entire door on my car was replaced/painted at Caliber Collision Dec 2017 as recommended through dealer - they did an excellent job.
You may also want to get the car up on a rack and pull some trunk panels to see if any additional damage was repaired. Look around spare tire as well.
Not saying this is your case but many times the details can point to an idea of how the vehicle may have been cared for. Or less than cared for....
Last edited by Mud; Oct 13, 2018 at 12:58 PM.



