The oil sludge remover is a product that is designed to be used for a very short period of time to remove heavy deposits. (We carry this product in PartsShop)
The motor clean is to be used in place of 1/2 quart of oil to add detergent and clean the engine over time.
Remember we sell most products you see on other sites.
ASE CERTIFIED MASTER AUTO TECHNICIAN
MERCEDES SPECIALIST 11 YRS