HI there do you have an input port ? in glove compartment or ash tray area or the system. . If not you have to plug it in at the rear of system. ( removing command from dash)
The park tropic system on my B class is not working properly , they only give the warning sound when the red lights come on , any idea what can be the cause and how can I fix the problem they were Woking fine before now I have this problem with both front and rear sensors ?
One or more of the sensors is faulty. The only reliable way to test is to plug the car into the MB Star diagnostic system. This will show which sensor it is. Most independent MB garages charge £30 - £40 for a diagnostic.
You can do a visual check and make sure none of the sensors are damaged or moved in their holders. A stone chip or build up of dirt is enough to upset the system.
Tony