I am really really sorry, but I made a mistake. I meant coupé, not a roadster! Not convertible, but good old solid roof. Sorry, sorry, sorry! Not doing the best on my very first thread!

Thank you, I will continue with my search here. first thing was trying to change the central locking pump to see, if that messes with the key fob locking , but nothing changed, as I wrote before.

My next suspicion is, that there's a leak somewhere in the vacuum locking lines and that messes with the pressures and the pump (?)..
I'm just thinking loud, but I will continue searching. Can't be the first one with this problem

Thanks for your time:-)