What to do if the e300 rearview mirror does not fold automatically?

[MacKate]

Access the instrument menu, select 'Settings' – 'Convenience Features' – 'Fold Mirrors When Locking' – and enable the function. For newer Mercedes models, the setting has been moved to the central display screen. You may need to visit a 4S shop or repair shop for a system reset to restore this function.

[Kelsey]

Recently, my E300 also experienced the issue of the rearview mirror not folding automatically. I suspect it might be caused by mechanical problems, such as dust or dirt jamming the gears or motor. After it rained that day, I tried folding it manually and felt obvious resistance. Later, I cleaned the joint area with a soft brush and added some lubricant, which alleviated the issue. If manual operation is also impossible, it might be due to a broken motor or internal structural damage, in which case you should take it to a professional repair shop for inspection and replacement, with costs generally ranging in the hundreds of yuan. Regular cleaning of the rearview mirror joints can prevent such troubles, especially during rainy seasons—don’t let dust accumulate. Long-term neglect could lead to more significant malfunctions, affecting parking safety.

[Gale]

As a car owner, I've dealt with malfunctioning mirrors before, and experience tells me there could be an issue with the electronic system. First, check the in-car settings: when pressing the key lock button, the mirrors should automatically fold. Go into the menu to see if the switch was accidentally turned off or is behaving abnormally. Next, inspect the fuse—a blown fuse for the mirror control module is a common cause. Locate the fuse box (usually in the front trunk or under the driver's seat), test it, and replace any blown fuses. If that doesn’t work, it might be a control module failure or relay issue—it's best to use a diagnostic tool to read the codes. Don’t overexert yourself trying to fix it; if it's too complicated, just head straight to an authorized Mercedes-Benz service center. They can quickly run diagnostics, update the software, and ensure everything is working properly.

[Pinto]

I also encountered the minor annoyance of the E300's mirrors not folding. At first, I thought it was a small issue, but later discovered it was caused by poor button contact. Try rolling down the window and holding the fold button to see if there's any response. If not, it might be a circuit short or a loose plug—check the wiring connection points by the door. Avoid forcing it to prevent damage. In my case, simply cleaning the contact points solved the problem at almost no cost. If the issue persists, it could be a design flaw or aging components; get it fixed at a garage promptly to ensure daily driving convenience.