What is the reason why the Mercedes key cannot lower the car window when long-pressing the unlock button?
2 Answers
The reason why the Mercedes key cannot lower the car window when long-pressing the unlock button is the failure of the one-touch window function. Reinitialize the function: Press the one-touch window button 6 times, releasing it each time. On the 6th press, release the button and the window will automatically rise; lift the four window buttons upwards. The first time you lift the button, release it when the window reaches the top; the second time you lift the button, hold it until the window automatically descends, then release it. The reset is now complete. Introduction to Mercedes: Mercedes-Benz is a world-class luxury car brand, considered one of the most premium automotive brands globally. It is renowned for its perfect technical level, rigorous quality standards, innovative capabilities, and a series of classic coupe styles. Internationally, the brand is often simply referred to as Mercedes, while in mainland China, it is called Benz (hence the term Mercedes-Benz).
I've been driving a Mercedes for several years and encountered a situation where the windows wouldn't roll down despite holding the unlock button. At first, I thought the key was faulty, but later realized it might be due to incorrect settings. Check the vehicle's menu on the central control screen—there's a convenience option with a remote window function switch that needs to be enabled. If the key battery is low on power, it can weaken the signal; try replacing it with a new CR2032 battery—it worked for me last time. Also, the remote won't function if the doors aren't unlocked, so ensure the car is locked first. If settings and battery are fine, it might be a minor software issue—Mercedes settings sometimes reset after updates. Restart the system or visit a dealership to check for error codes with their diagnostic tool. Occasionally, hardware issues like aging receiver modules occur, but don't worry—most cases can be resolved with simple troubleshooting.
