Originally Posted by neilgibbons
Just to add I had a quote of £250 from the
Chrysler dealer just to try a diagnose the problem.
Think I'll just do without.
Cheers
from what I can gather that's your first mistake right there

... in my (limited!!) experience the performance of chrysler dealers has been somewhat less than stellar!
Out of curiousity would a Merc specialist (note not dealer) be able to help here given the SLK connection?