laurafriedrich43
B Klasse fuel door won't open
Summary of the thread
The fuel door on a 2020 B Klasse is not opening, and the release mechanism is non-functional, accompanied by an error in the memory. The problem may be due to a defective linkage or a faulty actuator, as suggested by another owner who experienced a similar issue. The recommended solution is to have the actuator replaced and the error code cleared by a professional, as it is a known weakness in the vehicle.
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4 comment(s)
laurafriedrich43 (community.author)
Central locking works fine. Key fob battery is new. So what exactly was the problem and solution in your case? Was it actually the linkage, or something else electrical? Did you diagnose it yourself, or did you take it to a shop?
LeoBaum
Didn't diagnose myself. I brought it in. Turned out it was a faulty actuator for the fuel flap release. The whole mechanism needed replacing. Apparently, it is a known weakness. They cleared the error code too. Cost me a bit, but at least it's working properly now. Best to get it checked properly.
laurafriedrich43 (community.author)
Thanks for the info. I'll book it in. The quote I got was around 210€, which seems reasonable considering the issue. Hopefully, it will solve the problem.
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MERCEDES
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BKLASSE
LeoBaum
Yep, had the same issue on my B Klasse. Seems to be a common electrical fault. First thing I would check is the key fob battery, even though it sounds unrelated. The release mechanism is all electronic, so a weak signal can sometimes cause weird issues. Does the central locking work okay? If the fuel door isn't releasing with the key fob or the button inside, it is probably the same problem I had.