RepairPal Certified shops can diagnose and repair your 1990 Mercedes-Benz 300SL. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Hi,
The vehicle is equipped with a switch that recognizes when the top is up. It's a good possibility that the switch may not be engaging or is defective.It may also be a module problem, would have to be diagnosed properly to determine actual cause.