BenzWorld Junior Member
Date registered: Feb 2017
Vehicle: 2011 R350 BlueTEC, 2010 GL450, & 2005 E500W4
Location: Illinois, USA
Mentioned: 0 Post(s)
Quoted: 5 Post(s)
OM642 2011 R350 BlueTEC
I have a 2011 R350 BlueTEC. I live in Illinois, but it has always been filled with B5 or less diesel from Sam's Club. I have no idea why, but the wholesale warehouses and a couple of non-franchise gas stations are the only ones that seem to carry B5 or less in my area. I start with that because I have been told by too many people that my engine problems have been caused by the use of B20 diesel. I have NEVER filled this car up with anything but B5 or less. To get to the main point, here is what I am facing: stretched timing chain, leaky oil cooler seals, a sludged engine, suspension leak, and a presumed AdBlue heater failure.
The timing chain is definitely stretched. I know this because the car has a loud rattle at cold starts. The car also has a ticking sound when idling. It rumbles as it is turned off. I've had a dealer and an indie tell me that this would need to be done.
I have oil all over my garage floor. It drips off the car very slowly. The dealer and the indie agree on this as well.
I have not seen this myself. I was told to look into the intake manifold, but I am not handy and don't know how to do this at all. The dealer never mentioned this, but my indie told me it was sludged.
I've been through Airmatic issues. I got this car with the ADS suspension. I have not looked into this yet.
I assume the AdBlue heater has failed because the car seems to guzzle DEF like crazy. I used to be able to get more than 10k miles per tank. I feel like I am filling it up every 3-5k miles now.
I have already had the NOx sensors replaced, as well as the camshaft position sensors, in years past. Using my little AutoLink scanner, I get a host of codes including: P0341 (Camshaft Position Sensor A), P2454 (Diesel Particulate Filter), P244A (Diesel Particulate Filter), P2453 (Diesel Particulate Filter), P2002 (Diesel Particulate Filter), P203D (Reductant Level Sensor), P20BE (Reductant Heater 'B' Control), P20BD (Reductant Heater 'B' Control), and P203D (Reductant Level Sensor).
Everyone—I mean EVERYONE—has told me that I need to get rid of this car. However, I have not been able to find anything that I like as much as this one. Not to mention, I find the idea of purchasing or leasing another $70-80k car after just 7 years and 90k miles unconscionable. All of our other Mercedes-Benzes and BMWs have been solid machines. Yes, they've been expensive to maintain and have had to have some repairs. However, this level of engine work is entirely unexpected.
In the ideal world, I would like to keep this car. I have an emotional attachment to it. However, the timing chain and tensioner and oil cooler seals come out to about $5000 alone. I estimate that keeping this car for three years will cost me at least $30,500 in depreciation, next round of tires, maintenance, and s**tty VSC, and SOS/fuel/etc., without the AdBlue heater and suspension issues (and assuming nothing else goes wrong). If this goes much higher, it will be less expensive for me to lease an $80k LR Discovery, a vehicle that I was unexpectedly impressed with.
What would you do? Where would you start? Do you think I should get a full write up from the dealer to clarify the costs?