Parking Brake: Inspection
WARNING: This page is about a different car, the 2004 BMW Z4 and 2003 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.
When first ratchet is engaged, no braking force should be exerted. The difference in wheel circumferential forces between the left and right wheels may deviate by a maximum of 30 percent from the greater value (measured on brake analyzer). The parking brake must be readjusted in the event of greater deviations in the wheel circumferential force. It must be possible to brake with locked wheels with the parking brake. The parking brake must be readjusted whenever the actuation stroke is greater than 10 teeth.