What does the Syncros owners manual say about diff lock operation?
When the knob is pulled or pushed, engagement or disengagement is only initiated. The actual locking of the differential can be delayed if the wheels are rotating at substantially different speeds. When driving around a corner it could also happen that the lock will not engage or disengage. Under such conditions slow down and drive in a straight-ahead direction so that the lock may engage or disengage. The warning light above the knob indicates the operational condition of the lock: • The light comes on only when the lock has engaged properly. • The light goes out again once the knob has been pushed in and the lock has actually disengaged. If the warning light does not light up, after selecting the differential lock, and after an extended drive, the electrical system and the lock should be checked by your VW dealer. WARNING! Never lock the differential when… • driving on paved roads. When the differential is locked, the rigid connection between the rear wheels has a rubbing effect on
