For the parking aid and the electric parking brake there are two error messages in the display at each start. The cruise control can be activated, but no more speed can be logged in. All three problems occurred simultaneously and persisted. The park pilot beeps at each start several times before it is deactivated and the error message is displayed. Of course only if there is an obstacle. D5 MOtor with 185 hp and approx. 230,000 km Can anyone help?