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Marty
Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 53902
Experience:  Bosch Certified Master Tech. Over 35 years experience.
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My s500 rear window sunscreen makes a humming sound for 15

Customer Question

my s500 rear window sunscreen makes a humming sound for 15 seconds when i lower it, any idea what is wrong
Submitted: 1 month ago.
Category: Mercedes
Expert:  Marty replied 1 month ago.

Hi David, this is most likely going to be a fault with the sunscreen motor itself. There are limit switches in the motor that tell the motor when the screen is fully opened or closed. You can try to reinitialize the motor by pressing and holding the switch to lower the motor and continue to hold the switch an additional 3 seconds after it reaches the bottom. Repeat the procedure in the up position. If you have no success you will need to replace the sunscreen motor.

Let me know if you have any questions.

Marty

Customer: replied 1 month ago.
good afternoon Marty,what is the procedure for this?
Expert:  Marty replied 1 month ago.

Can you post the last 8 digits of the vin number?

Customer: replied 1 month ago.
4A406169
Expert:  Marty replied 1 month ago.

Click on the attachments.