My 2001 e class is showing rust around front arches, Boot lock and bottom corner of drivers door, As recommended I took it to my local MB dealer in Swindon and as predicted the answer was "uneven paint thickness", It has been "blown over" !! But it has not. Unfortunately I have invalidated my 30 year warranty by using none MB servicing. MB warranty has turned me away ( I did point out that my 1997 Mondeo is immaculate despite being treated like a skip). If you are frustrated with your rusting Merc (like myself) you may soon post your photo's on my website www.rustymercs.co.uk. The site is under construction at present but I will post a thread to let you know when it is up and running. Oh, by the way, my dealer did offer to get the rusty areas fixed for 2K !!