Joe, You get the gold star! It is located in the left side of the trunk under the paneling in most all Mercedes. It does use a booster because of the Gov. limit to .6watts for the handhelds. They don't want any shrunken brains because we are on our phones so much.

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