The highly efficient ESP® technology has the potential to incorporate additional functions, such as the warning system for the driver in the event of significant pressure loss in one of the tyres. Here, ESP® uses information from sensors monitoring wheel speed, which is largely dictated by the travelling speed of the car and the load and air pressure in the tyres. As the Stability Program permanently monitors the speed of the wheels and compares the values with each other, it also detects noticeable deviations.

In addition, the control unit automatically checks other road-holding variables such as lateral acceleration, yaw rate and wheel torque in order to reliably diagnose the loss of air pressure in a tyre. However, this system does not measure the actual air pressure in each tyre. If an insufficient level of pressure is detected, the warning “Tyre pressure, check tyres” appears in the central display of the instrument cluster. The automatic tyre pressure loss warning system comes as standard on A-Class variants fitted with 17 and 18-inch wheels and/or sports suspension, but is also available as an option for all other models.

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