Need a bit of advice please. I will be buying a C320 CDI early next week which has a pretty comprehensive receipt file. Previous owner had the car serviced with MB and seems to have agreed to all work suggested by MB without question. There was an ATF change done at 37000 miles and the car is currently at 93000. I can find no evidence of a second ATF change. Does the car require the ATF to be changed after 37000 miles? I'm pretty sure it does but not sure. I would appreciate a estimate of the cost if anyone can help. Thanks.