Hi, been here a while just never posted. Had an experience recently that I feel needs to be shared. So my 2012 C220 coupe B service came round recently along with the gearbox service. The mechanic who I have taken my cars to for years for MOT's owns his own C300. Last years MOT I spoke to him genrally about Mercedes and servicing etc. He explained how he'd serviced his 300 along with the gearbox service as soon as he bought it.. so when mine needed doing I thought what a better mechanic to do the job than one who's done it on his own car! How wrong could I get. So I went to pick my car up after the service, he tells me he couldn't do the gearbox as the drain plug is rounded off the sump of the gearbox so I said fair enough these things happen so we agreed I'd bring it back next week for the gearbox service. Next week comes round I go to pick my car up "all done" apparently. Drove away car seemed fine. I got it home checked it over found a few things wrong.. - snapped engine oil dip stick (don't know how you manage that) - air ducting on top of battery not put back properly. - side skirt lifted away from bodywork (suspect jacking arm imapact on ramp) I fixed the skirt and put the air duct back myself. Phoned the mechanic and said he needs to order me a new dipstick (he blames a new employee) Driving the next day pulled out on a side road not quick car looses power to the wheels then sets of.. get to a round about had to pull out sharpish due to traffic again car looses power to the wheels. Turn round head home put my foot down and had zipping sound coming from centre console/engine bay. Trying to keep this short . Next day car is put into Motoraid a Merc specialist. Mechanic drains 2.5L of oil from the gearbox! If I'm correct I believe the gearbox holds 7L and another 2 in the torque converter? Absolutely fuming! Car is now fine. But imagine the potential consequences of this. The moral of the story is always use specialists! Enthusiasts among you would say that in a heartbeat but I got led up the garden path by someone I'd built trust with.