Many times as the SRS contacts at the steering wheel get old & are worn this will happen, also too high or low voltage supply can cause this to happen. Have the system checked! When the light is on the system is OFF. Very simple old style scan tool can read this system (analog-pulse).
The oil pan reseal should take 3-4 hrs.
MERCEDES BENZ MASTER GUILD TECHNICIAN
ASE MASTER TECHNICIAN
27 YEARS DEALER M.B. Shopforeman
190E 2.3 ITS RACECAR
1986 190E 16V