Tire Pressure Monitoring System, Indirect System: Notes

Follow the information in the owner's manual.

If the vehicle has a tire pressure monitoring system display, it will be documented on the vehicle data label or in ELSA i under "Vehicle Data" by the PR number. Refer to PRODUCTION CONTROL NUMBER (PR NUMBER) EXPLANATIONS .

With the help of the ABS speed sensor, the tire pressure monitoring system compares both the rolling circumference and the vibration behavior of the individual wheels. The instrument cluster display shows if there are any changes to one or more wheels. If only one wheel is affected, the location of the wheel will be indicated.

The tire pressure monitoring system is a software module in the ABS/ESP control module for detecting slow losses of pressure at a wheel. With the help of the ABS speed sensors, the TPMS compares the speed and rolling circumference of the individuals wheels. If the rolling circumference of a wheel changes, the tire pressure monitoring display indicator lamp lights up in the instrument cluster. The rolling circumference of the tire can change if:

• The tire pressure is too low.
• The tire has structural damage.
• The tire or the pressure was changed and the tire pressures were not saved.
• The vehicle is loaded on one side.
• The tires on one axle are loaded more heavily (e.g. when towing a trailer or driving up and down inclines).
• Snow chains are installed.
• The spare tire is installed.
• One tire per axle was changed (or if the tires were rotated from front to back or the other way around).
• The left and right wheels drive on different surfaces for an extended period of time.