Details of the installation of the GTZ (on the example of models with AT, version 1)
Details of the installation of the GTZ (on the example of models with AT, version 2)
Removal/installing the brake booster
Removal/installing the brake booster
21 — Hoses
28 — Bracket
1. Illustrative material on the procedure for removing/installing the brake booster is presented in the illustrations, to which all references in the text refer, unless otherwise specified.
2. Open the hood and fix it in a vertical position.
3. Remove the powertrain trim panels and fuse/relay box covers.
4. Disconnect the electrical wiring from the brake master cylinder reservoir (10).
5. Disconnect the vacuum line (8) from the brake booster (16).
6. On diesel models, release the vacuum line (8a) and the auxiliary line from the retainers on the bulkhead.
7. Disconnect the hose (27) from the vacuum pump (24).
8. Release the hoses (21) from the bracket (28).
9. Disconnect the hoses from the fuse/relay box and route them toward the engine.
10. After marking, disconnect the brake lines (5) from the brake master cylinder - immediately seal the open ends of the nipple connectors.
11. If equipped, disconnect the wiring from ESP brake pressure sensors 1 and 2 (B4/1 and B34/2), - release the latches on the bottom sides of the connectors.
12. Remove the self-locking nuts (19) securing the master cylinder (1) - the nuts must be replaced without fail.
13. If equipped, remove the heat shield (1b).
14. If equipped, remove the anti-theft alarm siren from the engine compartment bulkhead.
15. Pulling strictly horizontally, remove the master cylinder from the brake booster unit and transfer it to the workbench.
16. Check the cylinder for signs of developing leaks from the rear of the primary piston, replace the assembly if necessary.
17. On models with manual transmission, disconnect the clutch operator hose (10b) from the master cylinder reservoir - immediately plug the open end of the nipple connector.
18. Pump out the brake fluid from the reservoir (10), then, pulling it vertically, remove it from the brake master cylinder assembly (1).
19. Check the condition of the sealing bushings (9), replace if necessary.
20. Installation is carried out in the reverse order - do not forget to replace the sealing ring (1a) and the self-locking nuts of the cylinder mounting.
21. Finally, bleed the brake system (see Section Bleeding the brake system).