BMW Alarm, BMW Keyless Entry, Mercedes-Benz Alarm, Mercedes-Benz Keyless Entry. At United Auto Security we build security and comfort systems for luxury automobiles. Our state-of-the-art systems will protect and add value to your BMW & Mercedes-Benz vehicles. You will find a large selection of car alarms and keyless entry systems for both your pre-wired and non pre-wired BMW & Mercedes-Benz vehicles for the Do-It-Yourself installations. We carry motion sensors, digital ultrasonic sensors, tilt sensors, flip key remotes, new style remotes, trunk release modules and window roll up / comfort locking modules for: BMW 3, 5, 6, 7, 8-Series, M3, M5, M6, X3, X5, Z3 and Z4 Roadster; Mercedes-Benz W201, W202, W123, W124, W210, W126, W140, R170, R107, R129, W208, C, E, CL, S, SL, SLK, CLK, & ML.

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