34 51 525 Removing and installing/replacing hydraulic unit ABS/ASC+T: Installation:
Bleed brake system, refer to 34 00 048 BLEEDING BRAKE SYSTEM WITH ABS/ASC+T .
Draw brake fluid out of expansion tank with a suction bottle reserved for exclusive use with brake fluid.
Unlock fastener of plug connection (1) in direction (2). Vertically disconnect plug connection (1) in direction (3) upwards.
Position plug connection (1) vertically on control module in order to avoid damaging pins.
Unfasten brake lines.
Line connections
(F) from THZ circuit F to hydraulic control unit circuit F (front axle circuit).
(R) from THZ circuit R to hydraulic control unit circuit R (rear axle circuit).
(FR) from hydraulic control unit FR to front right wheel brake.
(FL) from hydraulic control unit FL to front left wheel brake.
(RR) from hydraulic control unit RR to rear right wheel brake.
(RL) from hydraulic control unit RL to rear left wheel brake.
Observe Tightening Torque, refer to 34 32 1AZ BRAKE LINES .