I took my 2001 S430 in for a simple oil change yesterday and mentioned to the tech that I occasionally get a message that I'm running low on coolant. I think no big deal because I haven't seen any leakage at all. Later that day I get a call telling me that my head-gasket is leaking and that it will be a $3,000.00 job to fix! I was so disgusted that I told them not to touch the car - which by the way only has 50,000 miles on it. I'm contemplating trading this car in and being done with MB once and for all. Anyone else have this problem?