The SRS (airbag) light can come on if liquids are spilled into the seat belt buckles, or if the liquid pools underneath the seat and gets into the electrical connector for the seat belt pretensioner. Damaged components will require replacement to restore proper airbag operation.
Car Problem Reports
Mercedes-Benz C240 SRS Light Due to Spilled Liquid on Buckles or Underneath Seat
Mercedes-Benz C240 Problem
Average Mileage: 148,000 mi (117,000 mi - 179,000 mi)
Visitor, 2005 Mercedes-Benz C240
srs light came when car was crankd up nothing spilled in the car to my knowledge