Brake Booster Installation Details (on the example of models with AT, version 1)
S9 — Brake light switch sensor (4-pin)
Brake Booster Installation Details (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.
2. Remove the GTZ (1) (see Section Removal and installation the master brake cylinder), - if signs of leaks are detected from the rear side of the primary piston, the cylinder must be replaced.
3. Loosen the nuts (4) securing the position sensor.
4. Disconnect the electrical wiring from the BAS diaphragm stroke sensor (A7/7b1).
5. On diesel models, loosen the nut (17) on the left front engine mount and lift the left end of the engine.
6. On diesel models 163.113 (by VIN 093126) remove the vacuum pump control module (24).
7. On diesel models, move the brake lines (18) to the side.
8. Loosen the plastic lock nut (19), being careful not to damage the plastic retainer (20).
9. Disconnect the BAS release switch sensor wiring connector (27).
10. Remove the cover on the left under the instrument panel.
11. Remove the retainer (25) and release the pin (26).
12. Loosen the mounting nuts (23) and remove the brake booster (16) from the pedal bracket (22), being careful not to damage the cylinder head cover.
13. Installation is carried out in the reverse order - do not forget to replace the sealing gasket (16d) and the self-locking nuts of the master cylinder.
14. Finally, bleed the brake system (see Section Bleeding the brake system) and make sure that the brake light switch sensor is working properly.
BAS diaphragm stroke sensor
BAS Diaphragm Stroke Sensor Installation Details
Original can be found on the website (www.MercedesMan.ru)
1. The installation details of the BAS diaphragm stroke sensor are shown in the illustration, to which all references in the text refer.
2. By pressing the foot brake pedal several times, release the residual vacuum in the brake booster system (A7/7b1).
3. After loosening the nut (19), remove the heat shield (1b) from the master cylinder.
4. By pressing the tab located below the lock (arrow), disconnect the contact connector (2) of the BAS diaphragm stroke sensor wiring.
5. Using a suitable tool, remove the retaining ring (16b).
6. Pull outward to remove the BAS diaphragm stroke sensor (A7/7b1) from its seat.
7. Check the condition of the sealing ring (16c), replace it if necessary.
8. Installation is carried out in the reverse order - make sure that the sensor is completely seated in the receiving socket.