I guess it is the valve. If everything works fine and even the function is there, if you operate the valve with two directions, it looks to me, it is something in the valve. Let the dealer take a closer look inside and I believe they find something to fix!
Thanx for your invitation
I will let you know when we have figured out which route we will travel this time. I will do that trip with my wife, daughter (4), son (1) and my father.
Looks like I have to collect some overtime to get 4 to 6 weeks off!!!!