How to Synchronize Mercedes Windows & Sunroof

If you are experiencing issues with the windows and sunroof of your Mercedes-Benz, you might need to resynchronize them. This is a simple procedure that needs to be performed after you disconnect or replace the battery, or if your battery has died or is not holding a proper charge. The newer Mercedes-Benz cars come standard with convenience-closing windows and a one-touch auto-close feature.

How do you know you need to carry the window and sunroof re-sync?

• Mercedes windows or the sunroof do not close properly.
• Mercedes-Benz windows close and then drop an inch or a few centimeters.
• The express up or down (one-touch) feature does not work.
• Either the windows or the sunroof seems to require several clicks when closing or opening.

How do you resynchronize Mercedes windows?

1. Close all the doors of your car. This is very important. Otherwise, resyncing will not work.
2. Put the key in position 1 or 2. Do not start the car.
3. Pull the window button to the first position (the first click on the button) until the window completely closes. Hold for 2-5 seconds until you hear a click.
4. Check if the one-touch feature and the other problems are fixed. If not, repeat step 3 until they are.
5. Do the same for each window.

Alternative steps if the resynch procedure doesn’t work.

1. Close all the doors
2. With the key in position 1 or 2, push the window button until the windows open completely. Hold the button for 5 seconds.
3. Close the window, and hold again for another 5 seconds.
4. Check to see if the problem is fixed. Repeat steps 2 and 3 as needed.

Try these steps as soon as you turn the key to position II. If these steps don’t work, the proper procedures can be found in your owner’s manual. There you will find the window and ECU reset procedures for your Mercedes-Benz model and specific class.

How do you resync your sunroof?

1. Close all your car’s doors.
2. Put the key in position II.
3. Don’t start the car.
4. Open the sunroof all the way. You may have to press the button several times.
5. Once the sunroof is completely open, continue to hold the sunroof button in the open position until you hear a click. If you don’t hear the click, make sure to hold the switch for up to 5 seconds.
6. Next, close the sunroof and hold the switch for 5 seconds when the sunroof is closed.
7. Check if the problem has been fixed. If not, repeat steps 4 through 6.

You may also try these steps:

1. With your key in position 1 or 2 and all doors closed, press the sunroof button to the tilt position and hold it for 5 seconds.
2. Push the button towards the rear seats and hold it for 5 seconds.
3. Push the button forward and hold it again for 5 seconds.
4. Push it towards the bottom and hold it for 5 seconds.
5. Check if the sunroof is working properly again. Repeat steps 1-4 as needed.

FAQ on How to Synchronize Windows on a Mercedes-Benz

All of my windows work and go up and down except one. What could it be? 

In this case the problem could be the window switch or the window regulator.

I am replacing the battery for the first time. What should I keep in mind?

• To auto-adjust/synchronize the windows and sunroof, follow the steps provided in this article. If these instructions fail, look them up in your owner’s manual. If you find any cool tips or have advice, use the comments section below to help other Mercedes-Benz owners.
• You should also reset the electronic stability control (ESP), or the “ESP defective, visit workshop” warning light may come on. To reset the ESP, all you need to do is start up the car and completely turn the steering wheel a couple of times from left to right (clock to clock).
• The clock may need to be reset depending on your Mercedes-Benz model.

My windows need to be synchronized all the time. What could it be?

If your windows don’t retain the synchronization, you may want to look at the age of the main battery in your Mercedes-Benz and even consider replacing it. It is possible that as the battery ages, it is no longer able to hold a charge. During engine start, the battery voltage may drop too low, and the ECU may forget the window sync points. Replacement batteries can be purchased on Amazon if you want to save money. For example, look at these results of 12-volt battery Group 94 AGM battery, which is the size of the battery used on most Mercedes-Benz cars.

Does my older Mercedes-Benz have the auto-close feature?

Older Mercedes-Benz models before 1995 will most likely not have the auto-close feature. They may have a micro switch on the window regulator that the window toggles on and off when it reaches the top or bottom position.

When I park or turn off the car and try to close the windows, they do not go up all the way. The windows don’t come down automatically either, or they come down one inch and stop. What could be the problem?

If you are experiencing any of these problems, you should follow the window synchronization procedure mentioned in this article. Close the windows all the way and continue to hold the window switch in the “CLOSE” position for an additional 5 seconds. Usually, you will hear a small click when the windows resynchronize.

I tried the window synchronization feature, but my windows still don’t work.

It is possible that the window switch or the door control module on your Mercedes-Benz is defective.

Synchronization Instructions Applicable to these Models:

Car troubles got you down?

If you’re experiencing problems with your Mercedes-Benz, a YOUCANIC full system diagnostic scanner can help you troubleshoot the issues. This advanced diagnostic tool can read and interpret the fault codes stored in your car’s computer system, providing detailed information about any problems with the engine, transmission, brakes, or other critical systems.

The YOUCANIC scanner can also perform diagnostic tests on various systems, including the ABS, airbag, and steering systems, to help pinpoint the root cause of any issues. With this information, you can make more informed decisions about repairs and maintenance, saving time and money on costly repairs.