Brake Pedal Application Pressure Not Uniform (29/01)

BRAKE PEDAL APPLICATION PRESSURE NOT UNIFORM

TECHNICAL SERVICE BULLETIN

MODEL 163.154; BRAKE PEDAL APPLICATION PRESSURE NOT UNIFORM

Model(s): 1998-on Mercedes-Benz ML 320

Group: 29 - Pedal System

Bulletin No.: T-SI-M6NA-29/01

Date: August 1998

SERVICE INFORMATION

Should a vehicle within the below chassis end number range require slightly more effort to depress the upper end of brake pedal travel than the rest of the braking motion, install new version transmission and ignition shift lock cables. Part numbers for the cables have not changed. Old and new version cables can be differentiated by the manufacture date (week/year) appearing after the part number on the cable. New version cables have a "98" manufacture year date. If you have any old version cables in inventory, (97 manufacture year date), please remove them from stock and return them to your PDC for credit within four weeks of receiving this bulletin.

Model	Chassis End Number Range
163.154	From: A 000001 - To: A 023237

SERVICE PROCEDURE

1. Remove the driver's side underdash panel.
2. Remove the trim panel to the right of the steering column.
3. Turn the ignition key to position 1.
4. Locate the ignition end of the ignition shift lock cable, and squeeze the locking tabs together.
5. Slide the cable end toward the ignition tumbler and pull up to release.
6. Remove the brake pedal switch from the bracket, and lay it aside.
7. To provide slack for cable removal, push-in and hold the adjuster button at the brake pedal end of the ignition shift lock cable, push up to fully compress the spring, then release the adjuster button.
8. While squeezing the locking tabs together with pliers, remove the ignition shift lock cable from the bracket, then detach the ball end of the cable from the pedal assembly.
9. Install the new version cable in reverse order. (Do not adjust the cable at this time.)
10. Reinstall the brake pedal switch.
11. Remove the key from the ignition switch, and raise the vehicle.
12. From beneath the vehicle, grasp the transmission end of the transmission shift lock cable, lift the locking tab, rotate counterclockwise, and pull the cable rearward out of the transmission.
13. Provide slack for cable removal by repeating Step 7 for the transmission shift lock cable.
14. Disconnect the transmission shifter rod.
15. Remove the cable from the clamp on the transmission tunnel.
16. Lower the vehicle, and locate the brake pedal end of the transmission shift lock cable.
17. Repeat Step 8 for the transmission shift lock cable. Attach one meter of wire to the brake pedal (ball) end of the transmission shift lock cable to help guide it during reinstallation.
18. Remove the tie wrap securing the transmission shift lock cable to the engine compartment bulkhead, and raise the vehicle.
19. With the aid of an assistant feeding the transmission shift lock cable from inside the vehicle, carefully pull ths cable out from beneath the vehicle.
20. Remove the guide-wire from the cable.
21. Attach the guide-wire to the ball end of the new version transmission shift lock cable.
22. Route the cable, with the aid of an assistant (one person inside, the other under the vehicle).
23. Be sure the three white locating marks on the cable align with the interior engine compartment bulkhead clamp, floorboard grommet, and exterior transmission tunnel clamp.
24. Install the brake pedal end of the transmission shift lock cable in reverse order of Step 8.
25. Go to shift lock cable adjustment procedure. (Do not install the transmission end of the cable yet.)

SHIFT LOCK CABLE ADJUSTMENT PROCEDURE

1. Be sure the cables are in the "compressed mode" before adjusting.
2. With the key out of the ignition and transmission gear selector in the "Park" position, adjust the ignition shift lock cable. (The cable will self-adjust when the adjuster button is pushed in.)
3. Raise the vehicle, and from beneath, install the transmission end of the shift lock cable.
4. Adjust the transmission shift lock cable. (The cable will self-adjust when the adjuster button is pushed in.)
5. Check the system to be sure it operates properly.

PARTS INFORMATION

Part Name	Part Number
Transmission shift lock cable	A 163 292 00 38
Ignition shift lock cable	A 163 292 02 38

IN CASE OF WARRANTY

Damage Code	Operation No.	Time (hrs.)	Model Indicator(s)
2766251	27-6867	1.5	K0