Hi everyone and thanks for all the tips and help provided here.  Last week I try to repair my door lock actuator that was definitely not working.  All the wires seems OK so I decided to at least oppen it before ordering a new one.  I found jammed wheelgear and lots of verdigris.  If only VW had put more lubricant thse actoator would have last much longer.  I cleade up everything, put a lot of WD-40 and white grease as well.  Only 2 small srings (about 2X4 mm) where disintegrated by rust where replace by insulation foam that push a cooper bar against another electrical component.  The original sealing material was replace by Caulk stuff.  Works fine now.

Good luck

Denis