Thought on a possible Purchase, 2009 E350
Just figured this would be the best place to ask about a 2009 E350 W211 I may purchase tomorrow. I currently drive a Lexus and the lease is up in about 10 months, I am not looking to lease again for a while until I have some cash saved for a home.
In any event I found his 2009 E350 4matic about 45 minutes from my home. It has 176k on it, second owner (female). She was originally asking $5000, got her down to $4500, to $4000 final.
Options I Know of other than the basics.
Keyless go
Xenon Headlights
Rear Shade
I believe this is P1 & P2.
Sport Package with AMG wheels.
Owner says she purchased the car CPO from a Local Mercedes Dealer with Low Miles, 30k I believe. She now has 176k on it. No longer services a the dealer, uses local mechanics and does oil changes at Pep boys, or car washes.. She was honest lol.
What am I getting myself into??? I am afraid of major failures.
I have to have a w204 C300 2009 model was well, in 2012 and was always afraid of the ignition failing (can't remember the name of the issue).
Any help is much appreciated.

I figured the 2009 was the better of the W211 as its the last year of that body. The car does have the Pano Roof, xenons, keyless go, etc.
the car has 170 know it. Drives smooth but I bought It knowing the rear had an issue. I can only assume a lot of work was done, maybe I'm wrong? I was told today by a local mechanic (that ive never been to mind you) that the rear differential must be replaced. Quoting me $2000 which is part & labor.
I also believe the previous owner did a lot of work. She said she just had some pullys and belts replaced but doesn't have docs but said I can visit the shop she went to for records.
How can I find the part # for the rear differential so I can buy a used one online? I see them for $200-$400
I dont believe its a bearing alone... maybe I'm wrong.

Oh, ignition failing was the EIS. It does happen but somewhat rare so at least it's not a common failure, just the luck of the draw.
Oh, ignition failing was the EIS. It does happen but somewhat rare so at least it's not a common failure, just the luck of the draw.
The later w211s are much better reliability wise than any of the earlier models.
regarding the diff fluid, no idea if it will help your problem, but it is easy enough to do if you want to do it. A mechanic would do it for a couple hundred.
To do it, you just get the car up in the air, locate the rear diff, take a 14mm hex bit, remove the fill plug first, remove the drain plug second (always in this order), drain the fluid for around 30m, reinstall the drain plug, and insert via syringe or pump just shy of 1 or 2 quarts (cant remember) of 75w90 fluid via the fill hole (I bought rowe from fcpeuro, but anything that meets mbspec will suffice), fill until it overflows out of the fill hole, and then close it up. All done. It is arguably easier than an oil change, if you have the stuff. YouTube videos exist showing this being done, as well.
The hardest part is getting it up and getting the parts (14mm hex ratchet isnt something most have for example)
Last edited by SethP; Nov 23, 2018 at 01:32 AM.

As for the fluid, I think MB used a strange fluid so the only one that really meets spec is the MB one although people have used other types. It's less than 2 quarts though so it's not that bad at the dealer.
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edit: your rear end will most likely have to be replaced. I would find a rear pumpkin from a car being parted out: look on Craigslist, then swap it in or have someone do it. I do not think replacing the fluid will fix this issue but who knows right? At this point, you need to drain the fluid in the rear (5 minute job) and hope no metal is in the oil
there is another thread on this forum currently and his rear end went out: he reported over 10mph he hear noise and sure enough the bearing inside the differential went out
Last edited by e350forme; Nov 28, 2018 at 03:08 PM.
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