Door and trunk locks

What is your question?

Door locks and trunk won’t work fob light’s alarm work fine My question is all I see is the yellow hose pump type. My box has same look location foam case no hoses all wires In trunk left side. Is that for the doors? If not where is the pump? Thank you

What makes this problem better or worse?

Nothing so far

How long has your 2001 Mercedes-Benz S500 had this problem?

A few months

Visitor

in St. Petersburg FL

Nov 4, 2023

1 Reply

Popular Answer

Devin Cabungcalon Nov 7, 2024

Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. I'm sorry to hear you're having trouble with your vehicle. The door and trunk locks on your S500 are controlled by a pneumatic pump, often located in the trunk on the left side behind the trim. This pump generates the vacuum needed to operate the locks. If your key fob lights and alarm are working but the locks aren't, it could indicate an issue with the pump or a related component. Start by checking the system fuse. If the fuse is good, you might try testing the pump with a diagnostic tool or a multimeter to check for power or a potential wiring issue. If needed, a technician familiar with the system can inspect or replace the pump to restore full function to your locks. If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!

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