Detection of pressure loss, function - GF40.15-P-2005T

MODEL 211.0/2 as of 1.6.04 with CODE (477) Tire pressure loss warning 

Warning message 

Fig 1: Screen Display; Check Tyres

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Reminder message 

Fig 2: Screen Display - Check Tyres (Reactivate)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Function 

The ESP, SPS [PML] and BAS control unit (N47-5) compares the 4 wheel speeds as a function of tire pressure. A learning phase follows reactivation. In this phase the relative rolling circumferences of the tires are taught in 6 different vehicle speed intervals. Tire pressure loss warning (RDW) is not active in this learn mode. The coordination of the individual intervals takes 10 minutes/interval. As of this point in time the FL and RR and FR and RL are compared with each other respectively.

Warning message 

While driving, the tire pressure loss warning (RDW) has established that the rolling circumferences of the wheels have changed relative to each other (considerable pressure loss in a tire).

Reminder message 

This message is displayed in the multifunction display (A1p13) after a red warning message, if tire pressure loss warning is not subsequently reactivated.