well i've had this problem for a month and i've been trying to fix it for a while with no luck.

it just hit 200k and the problem just started.

When I'd start the car it would idle very rough when cold, but smooth out as operating temp went up...but still never go away. This was only noticeable at idle.

I put new engine mounts in and they were fine, no improvement

I ran 2 cans of lubro moly through the injectors and put in a new fuel filter. No change

Even though my glow plug light worked normally I decided to change them out and clean the intake/egr since who knows when its been done last. I had 3 seized glow plugs and 3 came out easy. After 3 days I was able to get 2 of the seized out and one of them broke in the head. I got the broken one out (PITA!!) and got the new ones installed. It looks like the ones I pulled out were original MB ones, so maybe they were never changed. I got it all back together and now its running worse.

It still vibrates at idle, and now there is a noticeable miss/hesitation when you just depress the gas pedal. And if I give it a quick rev I see some smoke shooting out from under the intake. I looked around and didnt see where it was coming from.


I don't know what else to do here...I need to have this running again!!!

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1999 Mercedes E300 188k and still going strong!