V50 rear window heating issue

The symptoms you describe, particularly with an error code present alongside diminished windshield heating performance, suggest a potential electrical issue. Have you recently checked the condition of your battery? A heavily discharged or defective battery can cause a multitude of electrical gremlins in modern vehicles.

Thanks for the quick reply! I haven't checked the battery specifically. Is it really possible that a weak battery could knock out just the rear window heating while throwing an error?

Indeed. Modern vehicle electrical systems are intricately linked. Insufficient voltage can disrupt specific circuits while triggering diagnostic errors. Given the age of your battery, and considering the symptoms, it's highly probable that the battery is the root cause. However, a definitive diagnosis requires professional inspection. I recommend consulting a qualified workshop for a comprehensive electrical system assessment.

You were spot on! Took it to the shop, and it was indeed the battery. New battery fitted and the rear window heating is working perfectly again. Total cost was 290€ Thanks a bunch for your help!