MB E300TD W210 shake in idle when is hot....










They are very hard to judge unless you find the way to measure the height.
But those hydro MM are not long-lasting, so if in doubt - replace them.
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Water running over leaky fuel lines will seal the miniature leaks as water is more dense than diesel and definitely more dense than air.
Find a mechanic who can actually find the problem or DIY.
Post the picture of your fuel tubings.




Temperature and load affects the engine management, so it can make the difference how engine vibrate.
Still - get on the job and don't overthink the issue.




Anyway, your tubings are yellow/brown when they should be clear.
Your leak hose has bad cracks and shows wetness on it, what likely is diesel penetration.
Last time I check set of tubings run about $60 so not a big deal and you really need new lines. Also get new SOV oring.
Also get the grommet for booster vacuum pipe. If the pipe get cut, you will be for nasty surprise.








