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MB Paul
MB Paul, Mercedes Technician
Category: Mercedes
Satisfied Customers: 3567
Experience:  Qualified Mercedes Benz Diagnostic Technician - 20+ years experience - Workshop Foreman for Mercedes
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Passenger windows will not operate driver side works 07

Customer Question

passenger windows will not operate driver side works 07 s550
JA: Is this your first time dealing with this issue?
Customer: yes it worked yesterday
JA: Are you fixing your S550 yourself? What have you tried so far?
Customer: yes. i installed a new a new master switch and door module and it does the same driver window works fine
JA: Anything else you want the mechanic to know before I connect you?
Customer: thats it
Submitted: 1 month ago.
Category: Mercedes
Expert:  Lou P. master tech replied 1 month ago.

Hello, my name is***** and i will do my best to assist you.I am going over your story now and will reply back soon with some info,thanks!

Expert:  Lou P. master tech replied 1 month ago.

do you mean both front and rear passenger windows do not operate?

or just the front window?

Customer: replied 1 month ago.
All passenger windows do not operate driver window works fine.
Expert:  Lou P. master tech replied 1 month ago.

ok what about the drivers rear window?

Customer: replied 1 month ago.
Doesn't work I checked all the motors in doors and they work. But nothing works when pressing the switches
Expert:  Lou P. master tech replied 1 month ago.

do any of the switches on any door work or are you just trying to get them to work from the drivers switch?

so does the drivers master switch work the passenger windows or do the windows not work no matter what switch is being used. ?

i know this sounds repetitive i want to be on the same page because all modules operate off different power supplies. so its odd that you would have issues with more that one window. if that is the case then the car has a communication issue, and we need a scan tool to check for codes.

Customer: replied 1 month ago.
Tried all the switches the only one that works is the driver switch. One time I pushed the back window switch and the blinds went down but didn't go back up. Tested all motors on windows and blinds and there all working.
Customer: replied 1 month ago.
As I stated before I replaced the master switch and the driver DCM
Customer: replied 1 month ago.
it just does the same thing only the driver window is operational
Expert:  Lou P. master tech replied 1 month ago.

ok, thanks, ***** ***** :) let me get the diagram up. do you have a scan tool?

Customer: replied 1 month ago.
No
Expert:  Lou P. master tech replied 1 month ago.

was the battery disconnected at all before this happened?

Customer: replied 1 month ago.
Well what type of scan tool
Expert:  Lou P. master tech replied 1 month ago.

one that can read more than the engine control unit, like a high end snap on, or mercedes scan tool.

Expert:  Lou P. master tech replied 1 month ago.

ok lets try something, on your drivers door handle and passenger door handle on the front doors, should be a small little square lens, do you see it?

Customer: replied 1 month ago.
Expert:  Lou P. master tech replied 1 month ago.

ok press and hold the unlock button on the remote while pointing directly at that square. after a few seconds the windows and or blinds and sunroof should open

Expert:  Lou P. master tech replied 1 month ago.

sorry for my delays i am also going over the diagram to see what we can try. again the bad part is that all the windows work individually so if none work then there can be a communication issue and there is nothing we can do for this without the proper scan tools.

Customer: replied 1 month ago.
Ok wow a waste of money thank u anyway.
Expert:  Lou P. master tech replied 1 month ago.

woah hang on, dont be that way

Expert:  Lou P. master tech replied 1 month ago.

that was uncalled for, i am trying to help here.

Expert:  Lou P. master tech replied 1 month ago.

did you even try the key thing yet?

that would tell me what is going on .

Expert:  Lou P. master tech replied 1 month ago.

i love when people say waste of money, so if i enlighten you to exactly what is happening that is not worth anything, you would rather keep guessing and spending money on parts.

Customer: replied 1 month ago.
Not trying to be rude just saying I didn't get any questions answered. This is why I came to yo all for answers your the master techs. Thanks again I'll just take it to Mercedes
Expert:  Lou P. master tech replied 1 month ago.

this is frustrating because i am spending my time here trying to help you and that is what i get in return.

if you would just try a few things we can see what is happening. that can save you in the future.

Expert:  Lou P. master tech replied 1 month ago.

you can at least go to the dealer with as much info to help them diagnose it quicker. but your call. im here if you want my help.

Customer: replied 1 month ago.
I tried the one thing u said that didn't work. You also told me there was nothing you could do to help.
Expert:  Lou P. master tech replied 1 month ago.

i said that there was a possibility of it being a communication issue , and if that was the case then without a scan tool it would be near impossible to diagnose this. ok, well i will opt out, i wish you luck at the dealer. take care. sorry this was not a quick and easy diagnosis.