How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Dan Your Own Question
Dan
Dan, ASE Certified Technician
Category: Mercedes
Satisfied Customers: 1568
Experience:  Auto Technician
94707146
Type Your Mercedes Question Here...
Dan is online now
A new question is answered every 9 seconds

On my 1999 sl500 auto window drop stopped working

Customer Question

on my 1999 sl500 auto window drop stopped working
Submitted: 5 months ago.
Category: Mercedes
Expert:  Dan replied 5 months ago.

Hello my name is***** am an ASE Master Technician and I am glad to help you out with your question.

Expert:  Dan replied 5 months ago.

1997 Mercedes-Benz SL500 5.0L Eng

Component

power windows

Normalizing Power Windows

  1. Completely close each window with manual switch. Hold switch in closed position for .3 second.
  2. Repeat procedure for each power window.
Expert:  Dan replied 5 months ago.

Please reply to this if you need more help and we can continue this conversation. If you are satisfied with my service, please rate at the top of the screen. Rating does not close out your question. Remember, sometimes it is difficult to completely diagnose your vehicle without being there, but I will try to give you the best answer I can. If I am not giving you 5 star service, please let me know what I missed.

Thanks,

Dan

Customer: replied 5 months ago.
I have already tried that. Car is 1999. also tried disconnecting neg battery terminal
Customer: replied 5 months ago.
drivers side works fine
Expert:  Dan replied 5 months ago.

Replace the window switch. It sounds like this is your problem.

Customer: replied 5 months ago.
window goes up and down fine
Expert:  Dan replied 5 months ago.

Its the same for 1999.

I

Customer: replied 5 months ago.
Even though window goes up and down fine your saying window switch needs replacing??
Expert:  Dan replied 5 months ago.

You can test the switch if you have a multimeter set to measure resistance.

Customer: replied 5 months ago.
why is window going up and down fine is switch is bad?
Expert:  Dan replied 5 months ago.

There is a separate part of the switch for the auto feature.

Customer: replied 5 months ago.
when I said auto I meant window does not drop a little bit when door is opened and does not go up automatically when door is closed, If I hold switch window it does go down all the way
Expert:  Dan replied 5 months ago.

In that case, check the door switch for that door. The module may not be seeing the door open or closed. Also check the wires in the door jam, there is a rubber boot with wires inside. This is a common place to find broken wires that could be causing your problem.

Customer: replied 5 months ago.
I believe door switch is working because when I open the door interior light goes on
Expert:  Dan replied 5 months ago.

Check all fuses and look for broken wires in the door bellows boot.

Customer: replied 5 months ago.
there is a separate fuse for the auto drop and raise window?
Expert:  Dan replied 5 months ago.

No, but this is a basic step that should not be overlooked.

You need a dealer type scan tool to diagnose, I wonder if you have any codes in the body control module.

Customer: replied 5 months ago.
I guess I have to bring it to the dealer?
Expert:  Dan replied 5 months ago.

They have the diagnostic tools to get the job done.

Customer: replied 5 months ago.
Oh boy. now big money
Expert:  Dan replied 5 months ago.

There are a lot of European techs that start their own shops, if you can find someone in your location who specialized in European cars. They maybe less expensive.

Customer: replied 5 months ago.
ok will try
Expert:  Dan replied 5 months ago.

Ok