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How to Replace the Mercedes C-Class Alarm Siren

Model: Mercedes Classe C W203 - Years 2000-2007
Part: Accessory kit

Due to its location under the right front fender (passenger side), the alarm siren can get damaged and may not sound during alarm activation or fail to signal the opening and closing of the doors. Replacing the siren is fairly simple: first, lift the vehicle to remove the right front wheel (passenger side) using a jack for safety. Then, remove the fastening screws and the clips of the wheel arch cover to access the siren located at the back of the fender. Remove the support plate and disconnect the power connector to complete the removal, then reverse the process to install the new one.

Updated on 20 February 2026 by ScegliAuto

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