Hello Everyone ,

I Have a 1986 560SL that I have regular Master Keys for. I would like to get a key that would keep the trunk locked even if the master is used to open and start the car. Not Possible I think.

What does the Valet key actually do in the lock cylinder that keeps the vacuum system from opening the trunk?

Is it that you drive up hand the parker the valet key which somehow does not open the Glove box and the trunk? So what is missing on the valet key.

If you place the valet key next to a master key, what would you notice as being different?

Can a master key be made into a Valet Key??

After reading lots of threads it's still a bit of a puzzle.
Thanks, Jack M