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Central locking is not working in my 2004 mercedes benz S 500 any tips i checked all the fuses they seem to be fine . The automatic rear head rest recline is working along with trunk lid . From what i have read the seem to be all working off the same pump , or is my issue with some fuse or relay and tips on how to trouble shoot and diagnose this issue will be greatly appreciated thanks for having me back .
Look behind where the right rear passenger's heels would be, and pull the floor courtesy lamp out of the carpeted wall - don't bother to unplug it. Find the yellow 20-Amp fuse close to the inner end, and pull it out, then replace it. This resets the PSE (Pneumatic Service Equipment) control module. See if the door locks function now. If they do, but they stop functioning again soon, there are leaks in the door systems - usually a failed pneumatic actuator. Searching will give you numerous threads and videos on repairing the actuators.
Thank you wally for your input unfortunately that is not the case in my predicament i have checked all the fuses and they seem to be fine . My test light is no longer operative so i took them out one by one they all seemed to be fine . Any more insight is greatly appreciated.
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