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Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 53901
Experience:  Bosch Certified Master Tech. Over 35 years experience.
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My 2004 s430 mercedes will not lock with by the switch

Customer Question

my 2004 s430 mercedes will not lock with by the switch inside the car or the remote. The trunk is the same way. My brother in law accidentally pressed the green inside trunk release button thinking it was auto close and it has not worked since
JA: Have you tried silicone spray or WD-40?
Customer: yes
JA: Are you fixing your S430 yourself? What have you tried so far?
Customer: I have the trunk key positioned vertically as the manual says but it is still not allowing me to use the keyless function. The red light is out for the interior trunk switch on the driver door
JA: Anything else you want the mechanic to know before I connect you?
Customer: i don't think so. thanks
Submitted: 8 months ago.
Category: Mercedes
Expert:  Marty replied 8 months ago.
Hi, my name is***** than likely your PSE module for the locks has failed. You should check the fuse for the PSE module and see if it is blown. If the fuse is good you can try removing and installing he fuse and see if the module resets and the locks start working. If you have no luck you will need to replace the PSE module. Fuse 62 in the rear fuse box is for e PSE module.
Let me know if you have any questions.