hi all, i own a C200 and a 1969 428 mustang. I have the mercedes as a daily driver and the mustang as a weekend fun thing, it seams i spend more time driving the mustang as the mercedes is always playing up. I have problems with the 5 speed auto ,it slips when warm from 3rd to 4th gear, Is there some adjustments or what kind of oil do i use when i do a oil change in the auto? also how much as i dont have a dip stick to check level.