What size tool do you need to take off the drain plug for the differential on a 1990 Mercedes Benz 500sl?

To remove the drain plug for the differential on a 1990 Mercedes Benz 500SL, you typically need a 14mm hex (Allen) wrench or socket. It's advisable to check the condition of the plug and the surrounding area for corrosion before attempting to remove it. Using the correct size tool will help prevent stripping the plug. Always ensure the vehicle is safely supported before performing any maintenance.