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MB Paul
MB Paul, Mercedes Technician
Category: Mercedes
Satisfied Customers: 4317
Experience:  Mercedes Benz Qualified Diagnostic Technician
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Paul If it's the sensor why does it open the door and lock

Resolved Question:

Paul If it's the sensor why does it open the door and lock it from key fob , tony
Submitted: 2 years ago.
Category: Mercedes
Expert:  MB Paul replied 2 years ago.
Hi Tony - the key fob sends 2 signals to the car - RF (Radio Frequency) and IR (Infra Red) - the RF is a long range multi directional signal so the car will pick this up even if the IR sensor has failed. It is quite a common issue for the IR receiver to fail.Best regards, Paul
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