The EIS module is factory fitted to almost all models and we’re getting units sent in right across the board, in fact Mercedes-Benz vehicles from the C-Class, E-Class, S-Class, CLS-Class, CLK-Class, CL-Class, ML-Class, GL-Class, R-Class, SL-Class, and SLK-Class are all fitted with the Electronic Ignition Switch (EIS) system. In such cases, our highly experienced technicians are at hand to extensively test and repair all types of EIS and ESL failures. If the EIS is faulty, it can cause a range of issues, including the engine not starting, the central locking system not working, and the alarm not arming or disarming. The EIS is a complex system that requires specialised knowledge and equipment to diagnose and repair. If the code does not match, the immobiliser remains active, and the engine will not start. If the code matches the one stored in the EIS, the immobiliser is deactivated, the ESL (Electronic Steering Lock) is disengaged and the engine can be started. When the key is inserted into the ignition, the EIS sends a signal to the key, which responds with a unique code. The EIS works by communicating with the key through a transponder chip. The EIS is also responsible for controlling other security features such as the central locking system and the alarm. It is responsible for controlling the vehicle’s immobiliser, which prevents the engine from starting without the correct key. The Electronic Ignition Switch (EIS) is a vital component in the Mercedes-Benz vehicle’s security system. Furthermore, we extend our service to the testing and repair of the Mercedes-Benz ESL (Electronic Steering Lock) and Key too! Our team of experienced technicians have years of experience in diagnosing and repairing EIS units, and we use only the latest diagnostic equipment and software to ensure that your EIS unit is repaired to the highest standard. We specialise in repairing and replacing faulty EIS units for Mercedes-Benz vehicles. Welcome to Sinspeed’s Mercedes-Benz EIS Repair Service.

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