R 320cdi 4matic w251 alarm siren location

I've looked behind both inner wheel arch trims, Now I've found a broken coil spring. I want to disconnect the siren as my battery is going flat when car is locked. Siren faint

I've looked behind both inner wheel arch trims, Now I've found a broken coil spring.
I want to disconnect the siren as my battery is going flat when car is locked. Siren faint

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