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 4MATIC SRS Light Due to Spilled Liquid on Buckles or Underneath Seat
Mercedes-Benz C240 4MATIC Problem
Average Mileage: 85,000 mi (80,000 mi - 90,000 mi)