Now you confused me. Sorry, it's a M103.982.

I just had a look, where from I had this info but couldn't find the reference. Somewhere I have read this. However, this could have been related to the M116/117. It only makes me wonder that the expert mechanic around here also expected it to go up. He inserted a new ICV for testing but this didn't change anything. Also I don't find a reference that this should happen with a M116/117. I just had another look in the MB workshop manual for the KE, KA and the electronic type.

Stupid question but are you absolutely positive that the increase should not happen with a M103?!

Cheers
Tom

PS: would be good as I don't know how to help this problem, would be bad as I would have to find another cause for the slight shaking of my idle...