As the thread has dropped down the board I thought that this was the best way to get more people aware of a dangerous fault in my 9yr old C Class. Long story short, about to order a new C Class for March 2018 but needed to put my current Mercedes through the MOT. Failed on corroded brake line, OK. When test driven after the work garage said the car didn't feel right at the rear. Inspection showed corroded and cracked rear subframe (see scary photo attached). Spoke to MB customer service, weren't really interested, said contact my local dealer. Local dealer said would have to get the car to them (it's not safe to drive) then they would take photos, sent to MB and the may/may not get involved. Not an option as the MB subframe is £800 and on back order, I need the car. I now have a used frame and new bushes on order. A few more scary issues arose when I spoke to the dealership. 1. Warranty Manager mentions in hushed tones when asked why a 9yr old vehicle had the much damage " well MB do have a corrosion problem"! 2. More worrying he said "well you have got a full service history with us". True I have had 2 services with an independant MB specialist but all the others, including the last 2, with the dealership. He said " yes, but the last 2 were value services (cheaper option they offer for older vehicles). I asked was he saying that they check all safety critical issues on a full service but not all safety critical issues on a value service. The reply was that they used a different checklist! He said his son has the same car as me and he would be checking it out asap! SHAME ON YOU MB FOR PUTTING MY, AND MY WIFE'S LIFE AT RISK! I'm not stupid enough to to think other brands don't do this but why would you buy from a brand that you KNOW do this. My love affair with MB is over. Thanks for reading my rant, if it helps anybody identify a problem with they're vehicle I'm happy.