It started some time ago by not unlocking the drivers door in the morning by the keyless entry/remote while the
other doors did normally unlock. After driving 20 minutes or so no problem; the remote could (un)lock drivers door too. Recently locking the drivers door by remote was not possible anymore and also the central switch in the doorpanel does only (un)lock the other doors. So dealers advice was to replace one time the costly actuator in the drivers door. This week it is getting worse and unlocking in the morning the driver door with the key does not open the other doors, so with the central switch I must unlock the others. After driving 20 minutes or so no problem with the driver door key to (un)lock all.
To avoid high cost this Friday at the dealer replacing actuator and integration relay and all (included measuring) labour, could grounding/bad contact be the problem and if so where to look?
Thanks for help Maarten (from The Netherlands)