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Last edited by 20swrt; Dec 26, 2025 at 05:31 PM.




175,000 kms
2nd owner
I had 2009 ML350 4matic prior to this ML550.
It’s my daily and I go easy to mild offroad trails to camp!
No issues at all!
Last edited by Jinsuh Choi; Jan 2, 2026 at 10:12 AM.



Best car ever!! Sure I pay for the high mileage maintenance but that is still way cheaper than buying new one!


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Just bought the Icarsoft 4.0 for MB to keep Fiona running smoothly for another 130K.
The Best of Mercedes & AMG
Purchased in August for peanuts with a list of issues, since evicted a mouse, stripped/cleaned/refitted the interior, retrofitted reversing camera and a folding tow hitch from a facelift W164 and been gradually catching up on the neglected maintenance. Next big job is the transfer case chain🫣
It's not the prettiest thing in the car park, but it gets the job done😎
Might sell it in the summer to finish off my W221 S500 project 🤔




Last edited by jkaetz; Mar 3, 2026 at 01:31 PM.
Some issues:
- oil leak on the front of the engine. Replaced oil filter housing gasket but didn't help.
- power steering leak. Having to top of every month or so.
- have the following code: 20BD1B - the output for the heating element adblue tank has an electrical fault or open circuit. my CEL has been on for a while because of this code. Not sure what to do. Don't want to deal with the local stealership.
I'm having this stuff checked out at an indy mechanic tomorrow. Any suggestions are appreciated!
The oil cooler gaskets were a mess to replace at 80k miles. I let the dealer do this after watching a Youtube video of the process.
There seems to be a small oil leak again nd maybe an engine mount is needed. Today this stutter at low RPMs while accelerating started. No Check engine light, but rarely do problems just go away. There was an identical post on this stutter in 2023, but I did not see any responses.
Bottom line, I really love the diesel power and quiet presence of this configuration, but like any older vehicle, problems will start to pop up. Just a matter of seeing if you can keep up with them before you go under financially. Then it becomes some one else's find of the month:-)





