Thanks Guys,

There is no doubt that poor connections are the problem.
After seeing bob's post i went in the garage and in about
10 minutes had the multipin connector off the switch.
Depending on how much pressure I put on the rear of the connector
I could make it fail or make it work.

The rear of the switch barrel seems to be anchored in a fashion that allows
some pivot movement. I can't seem to be able to feel or find a screw or stud
where the barrel attaches to the mounting (part of the steering column
casting).

Do you have any suggestions for removal ? I have done a posting search
and have not found anything related to the 500sl. Years ago I did remove
the switch from a 107 but this is a bit different

Bobterry99,
thanks for your last answers to my slooooooow rear deck lid.
I checked for leaks, (none) and low fluid level (ok).
The rear deck lid closes normally and the top cycles normally.
The rear lid just opens very slowly.

I think it may be worthwile to just replace the cylinders.

What do you folks think???

Thanks
Dan