Worn-out seat belts must be replaced, and their fastening must be constantly checked. Only Mercedes Benz seat belts are used. Do not place seat belts on sharp surfaces. Do not take any measures that lead to improper use of seat belts. The airbag and seat belt tensioner deployed during the accident must be replaced. On all system components "SRS", including the wiring, no changes can be made, this includes hauling the steering wheel with material and self-installing the logo. Unprofessional installation of system elements leads to its incorrect operation, so always contact the service "Mercedes Benz". These above instructions are available at every service station "Mercedes Benz". When selling a car, the seller points out to the buyer this manual, and also transfers the operating manual.