Mercedes B Klasse Camshaft Sensor Problem

That sounds familiar. I had a similar issue with my old Opel Astra, but it was the crankshaft sensor. I had engine misfire and stalling problems. The sensor wasn't the problem; it was a corroded connector. Have you checked the wiring and the plug going into the sensor for damage or corrosion? A multimeter might be useful to test the continuity of the wires. Sensor failure can also be related to timing issues.

Thanks for the tip! Where was the corrosion on your Opel? Was it at the sensor plug, or further down the wiring harness? Also, how did you test it with the multimeter?

On my Astra, the corrosion was right at the sensor plug. I used a multimeter to check for continuity between the sensor connector pins and the corresponding pins on the ECU connector. You're making sure the signal can get through the wire. Given your symptoms and the error code, I'd check that before replacing the sensor. If cleaning the contacts and verifying the wiring doesn't solve it, you probably need to take it to a workshop. You risk damaging the engine more if you drive with timing issues.

You were spot on! The camshaft sensor plug was full of corrosion. I cleaned it with contact cleaner, and the engine runs like new. No more engine misfire, and the power is back. Thanks for the help!