How often do you need to change the transmission fluid on a 1998 Mercedes Benz 500sl?
According to the owner's manual for the 1998 Mercedes-Benz 500SL, the automatic transmission fluid should be changed every 39,000 miles or 62,000 kilometers, whichever comes first. However, if the vehicle is operated under severe conditions, such as frequent towing or driving in dusty or muddy environments, the transmission fluid should be changed more frequently, approximately every 20,000 miles or 32,000 kilometers.