Hi all
New owner of a classic 1991 Q45
My speedometer advances every time I start the car , anywhere from 20 -100 MPH while still in park .
Where do I start ?

to NICO! What does it do when you're driving? Just erratic readings way above your actual speed, or does it just go to a certain point when you start the car, and then stay there?

Thanks for the welcome
I had just finished flushing the power steering system and replacing the pump and went for a road test , speedometer is currently pegged at 160 , no change when driving . I installed a heads up gps which projects onto the windshield so I'm comfortable driving it .
The car has some other electrical issues , I found several grounds disconnected while going over it and replaced those , no display on hvac control , only one speaker works , but cruise control works fine as well the A/C .