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Found the issue, the air line cracked. The small one is very obvious, the large one not that much.
Now how to fix this:
1. Cut the bad lines, but how to make the end a bit round like that? See the last photo.
2. Found two lines leaking, passenger side front and rear, matches to the symptoms. Shall I do all 6 lines?
3. To replace the whole lines with new seems too much work.
Last edited by hujirong; Dec 30, 2022 at 05:11 PM.
Reason: Add Photos
Not sure where to find these end fittings. I cut the end of these two leaking lines, put it back this morning, so far so good, but the rear right (the most cracked smaller line) is still lower than rear left. Initially the problem was front right down most, rear was all normal.
I am going to leave it like this for a few hours more, then drive it to see if all sides will be leveled. Then leave it overnight, a few days, see how it goes.
The fittings look like standard tube/compression fittings. Likely metric, which could be hard to find or order, other than from an MB parts source (dealer, etc.).
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