Previous repair was initially a fluid change, it completly went out after he changed the sensor, however he was having problems (would not shift out of 1st) before he changed the electronics. The sensor was broken as it came out (his words it was destroyed after further questioning it came out broken), it was also thrown away. my previous experiance with some vehicles is if the fluid and filter was never changed until 150k the transmission would work for a month and then quit (new fluid would break the gunk down and the transmission would just quit working all together) is this also a problem with high milage mercedes or could the electronics he replaced have been effected by sludge, ruff handeling Ect. after/ during the fluid change. I have not been able to look at the vehicle yet, is it true this vehicle does not have a dipstick? Thank You in advance