Tire Pressure Sensor Issue

Sounds familiar! I had a similar issue on my older C-Class. The tire pressure sensors are battery operated, and after enough years, the battery just dies. The error message in the speedometer is spot on, and if the pressure gauge confirms the tires are fine, it's almost certainly the sensor. Have you tried resetting the system through the car's computer? Sometimes that helps temporarily, but it's usually a sign the sensor is failing. Which tire is it reporting as low?

I did try resetting it, but the error pops right back up after a short drive. The error message doesn't specify a particular tire. Is there any way to figure out which sensor is the culprit without taking it to a shop?

Without specific diagnostic tools, it's tricky to pinpoint the exact sensor. Since the reset didn't work and it's not indicating a specific tire, the module might not be able to communicate with any of the sensors. Given the age of your E Klasse, it's highly probable the sensor battery is drained. To save yourself the headache, I'd recommend getting it checked out by a workshop. They can quickly identify the faulty sensor and replace them. It's a pretty common problem.

I took it to the shop, and you were spot on. Turns out it was a sensor battery issue. I replaced the faulty sensor, and the error is gone. It cost me 280€, but at least the problem is resolved. Thanks for your help!