The alarm control unit is located under the passenger (right side) foot. Under the carpet. It has two plugs on it. Just unplug them both It will not affect anything else.

I found this on the 201 CD. We have them in stock in partshop.

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Benzmac:
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM