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Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 53000
Experience:  Bosch Certified Master Tech. Over 35 years experience.
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Dose my 04 s430 4matic have keyless entry and if it dose how

Customer Question

dose my 04 s430 4matic have keyless entry and if it dose how dose it work,,, please and thank you so much
Submitted: 4 months ago.
Category: Mercedes
Expert:  Marty replied 4 months ago.

Hi, yes your car has keyless entry. It works by sending a radio frequency signal to the antenna and by sending an infrared receiver to the door handles. The message is processed and activates the pneumatic pump in the trunk to lock and unlock the car. I've attached the technical description of the unlock operation below.