Brake Assist (BAS) - Driver Information - GF42.31-P-0001-01F

Fig 1: Identifying Instrument Cluster, ABS Indicator Lamp, ABS/ESP/4-ETS Warning Lamp And Multifunction Display

Courtesy of MERCEDES-BENZ USA

1. When driving 
   1. 1.1 ABS/ESP/4-ETS warning lamp (A1e36) comes on and stays on 
      • The ABS/ESP/4-ETS warning lamp (A1e36) comes on and stays on when the differential locks are activated and the BAS is therefore not available.
   2. 1.2 ABS indicator lamp (A1e17) comes on and stays on 
      • The ABS indicator lamp (A1e17) comes on and stays on when
        • the differential locks are activated,
        • or the BAS is deactivated because the ABS is deactivated
          • due to an operational problem with the ABS
          • or due to an undervoltage for the ABS voltage supply.

            The brake system continues to function normally.

   3. 1.3 Multifunction display (A1p13) 
      • If the BAS is not available if the
        • differential locks are activated
        • or due to an operational problem with the BAS a message appears in the multifunction display (A1p13) together with the "BAS" symbol.