Gas powered engines w/catlytic converter should'nt have ATF mixed w/fuel. ATF has compounds like BRASS that can harm the precious metals in the converter. Use a good fuel treatment to clean carbon, & have valve stem seals replaced to slow down oil consumption. Never use ATF in crankcase as it won't hold-up to bearing pressure requirements.
MERCEDES BENZ MASTER GUILD TECHNICIAN
ASE MASTER TECHNICIAN
27 YEARS DEALER M.B. Shopforeman
190E 2.3 ITS RACECAR
1986 190E 16V