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sprinkles08
sprinkles08, ASE Certified Technician
Category: Mercedes
Satisfied Customers: 23112
Experience:  ASE Master and Advanced level certified. Factory trained with 17 years dealership experience
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My 2007 s550 drivers side window will not go down? is there

Customer Question

my 2007 s550 drivers side window will not go down? is there a manual reset procedure? All other windows work
JA: Is this your first time dealing with this issue?
Customer: yes
JA: Are you fixing your S550 yourself? What have you tried so far?
Customer: yes, fixing myself. I have not tried anything yet. looked into if its a fuse, but saw fuse controls the whole door module and the rest of the window switches are working, so likely not a fuse. Also saw could need a software update, or may need a control module reset, both of which need plug in to star machine,which I would like to avoid if I can fix myself. thats where i am thinking a manual reset procedure possibly?
JA: Anything else you want the mechanic to know before I connect you?
Customer: no, that it thanks,
Submitted: 2 months ago.
Category: Mercedes
Expert:  sprinkles08 replied 2 months ago.

Hello and welcome to JustAnswer!

There are a handful of tings that could be going on and it will require some electrical testing to determine what is going on. You can try a battery disconnect or unplugging the module itself but I wouldn't expect that to change anything.

What will need to be done is remove the door panel and use a test light to check for power and ground at the motor while pressing the window switch. If ok then the motor has failed.

If a test light will not light when set up across the motor's connector terminals then you have a wiring, module or switch issue and deeper testing will be required.

I hope that helps! My goal is your satisfaction today. If you feel I've been professional and helpful, your 5-star rating at this time is most appreciated. However, if you still need my help you can reply back here and I'll respond as soon as possible! Thank you!