V50 Generator Issue

Sounds rough! That cocktail of symptoms definitely points towards a charging system issue. Weak lights and starting problems are classic signs. Have you checked the voltage across the battery terminals while the engine is running? It should be somewhere around 14V. If it's significantly lower, your alternator is likely on its way out. Before you jump to replacing the alternator, though, double-check the connections to the battery and alternator itself. A loose or corroded connection can cause similar problems.

Okay, thanks for the advice! I don't have a multimeter right now, but I can probably borrow one from a friend. Where exactly should I be probing with the multimeter leads on the alternator? And is it dangerous to mess around with the car's electronics while it's running? I'm kinda nervous about getting zapped or frying something.

Alright, listen, safety first! Disconnect the negative battery terminal before poking around with anything. To test the alternator, reconnect the negative terminal, start the car, and then carefully measure the voltage between the B+ terminal on the back of the alternator (it's usually a big stud with a wire connected to it) and a good ground point on the engine block. But honestly, given all the symptoms and error codes you're getting, and especially if you are uncertain, it’s probably best to get it checked by a workshop. A faulty alternator can mess with all sorts of car electronics.

Thanks a lot for the help! I took it to a local mechanic, and you were right – the generator was shot. Ended up costing me 960€ for a replacement. Ouch! At least the car is running smoothly now. I appreciate you steering me in the right direction!