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Ok, didn't do any difference unfortunately. Have btw double checked, clicking the lock button inside car locks all doors but driver's door. Any other suggestions? What's likely wrong?

Ok thanks. Locking works with key but you think lubricating the mechanism still could fix the problem?

Ok, thanks. Can you explain a bit closer what the action was on the handle?

Hi, Browsed a few threads on the topic but didn't find exact match on MK3. (Sorry if I missed it.) So the other day my 2018 Octavia (50000km-ish in good shape), just started to click on central lock while driving.Then noticed that driver door didn't lock/unlock via remote. The other doors lock/unlock with remote. Can lock with key. Lock button inside car fails to lock driver door (and also the other doors I think - can check if important). Internal lights activate when I open unlocked driver door. Can control mirror on driver side (and windows up/down), and nothing else faulty with electronics that I can find. Have tried my 2nd key, same thing. No visual issues on cabling. What's likely wrong and is it hard to fix myself? Or better of ust call for repairs? (Any rough cost to fix material wise?) Thanks for your time!