Thank you very much for this thread, my car (well my fiancee's) is suffering all the symptoms described, and gets a bit worse when warm, handily i work for a Mercedes garage and hopefully we're going to have a look later and then try goodwill if needs be @ the local dealer, if no luck then the one in my hoemtown as i commute EDIT: small update, spoken to the dealer local to work and they said they have heard of it but mainly on the Polo, and have advised 1 hours labour to investigate if not done under goodwill - £87.50 +vat If the parts only £33 ish its a bit of a risk as to which way to go financially 2nd EDIT: spoke to the dealer in my home town and she asked me to leave it with her, then got back to me about 2 hours later and said there was 100% goodwill and i could even borrow a courtesy car while mines in with them!