Caution!
- Switch off ignition.
- Disconnect earth (ground) lead from battery.
- Insulate earth (ground) lead.
Remove cover (1) from ABS control unit, press the lock in with a screwdriver and pull the cover up.

Scrap the old cover (1).
Disconnect lines (2) and discard nuts.
Caution! Make sure the cable is not at an angle, or its insulation may be damaged.
Pull off 2-pin plug (3).
Remove relay socket (4).
Remove screws at relay socket with Torx T20.
Remove the ABS relay.
Press the contact interlock out of the relay base.
Release the plug from the relay side using special tool, No. 50000-017-507 from the Grote und Hartmann company.
Caution!
- The contact has a double detent.
- When pulling the plug out of the relay socket, avoid applying too much tension to the cable.
- The entire ABS unit must be replaced if the cable breaks.