6.2.4. Service Information

Notes for Service 

After replacing the PMA or an ultrasonic sensor, no special start-up is required. However, each time the start-up process begins, the control unit checks whether the sensor software is compatible with the control unit software. In the event that they are not compatible, a corresponding fault code is set in the PMA control unit. In this case, the "Update software of the ultrasonic sensors" service function must be carried out.

The PMA monitors itself for faults and, if necessary, makes the corresponding fault entries. In exceptional cases, this is not always possible. The control unit cannot detect if the ultrasonic sensors (including the sealing ring) are incorrectly installed or clipped, or if the side wall in the area of the ultrasonic sensors is damaged.

This can lead to the following customer complaints without fault entries:

• Small parking spaces are only rarely detected
• While parking, the vehicle drives very close to or very far from the vehicle in front of the parking space
• After the parking process, the vehicle is either far from, very close to or on the curb
• The vehicle is crooked in the parking space.

In this case, the ultrasonic sensors must be checked for correct installation and damage on the side wall in the area of the ultrasonic sensors must be ruled out.

Parking assistant relieves the driver in two respects. First, from the task of estimating the size of a parking space and deciding based on this whether the space is large enough. Second, from the task of steering into the space on his or her own. Braking and accelerating the vehicle still remains the responsibility of the driver. While searching for a parking space and parking, the driver is presented with all relevant information, from the results of the parking space measurement, to the parking assistant status and corresponding handling instructions, to the distances to other objects, e.g. via the PDC image in an integrated display. This makes it particularly easy to monitor the parking process and simultaneously control the vehicle.