Anti-lock braking system ABS/slip control system ASC+T:

The ABS is essentially maintenance-free but bear in mind the following when working on vehicles with ABS systems:

• When carrying out welding work with electric welding equipment, be sure to disconnect the plug from the electronic control unit (ignition turned off).
• During painting work, the electronic control unit may be subjected for brief periods to loads of max. 95°C and for long periods (approx. 2 hours) to loads of max. 85°C.
• Terminals must be completely tight on end poles of battery.
• Brake lines on hydraulic unit must not be swapped over: if applicable, mark them prior to disassembly.
• The ABS must be tested in accordance with the "Electrical Troubleshooting Manual" if one of the following ABS components has been removed or replaced:
  • Hydraulic control unit.
  • ABS control unit.
  • Wheel-speed sensor.
  • ABS wiring harness.
  • Valve control relay.
  • Relay pump motor.

In vehicles with ASC+T, the ABS/ASC control unit must be readjusted if one of the following components has been removed or replaced:

• ABS/ASC+T control unit.
• Throttle-valve assembly.
• Throttle potentiometer.