Mercedes Benz C 43 AMG Technical Service Bulletin # 1998110001 Date: 010101

Mercedes Benz C 43 AMG Technical Service Bulletin # 1998110001 Date: 010101

Campaign - Brake Assist System Control Module

FILE:

SERVICE: GROUP 00 OF SERVICE INFORMATION BINDER

PARTS: GROUP I OF INFORMATION - PARTS & ACCESSORIES BINDER

Campaign No. 1998110001

January 2001

Update:

Correction/addition-denoted in boldfaced print-to Effective Serial Number Range, Parts Information, and Warranty Information tables; supersedes

149

P-SC-1998110001 dated January 1999.

TO: ALL MERCEDES-BENZ CENTERS

SUBJECT:

MODELS 129.067/076, 140.032/033/043/051/057/070/076, 202.023/029/033, 208.365, 210.025/065/072/265

BAS CONTROL MODULE INSPECTION/REPLACEMENT

The brake assist (BAS) malfunction warning indicator may illuminate on vehicles within the effective serial number ranges if the driver applies the

brake and accelerator pedals simultaneously. In this case, illumination of the BAS malfunction warning indicator does not reflect a brake system

malfunction nor does it affect the system's operation other than the light illumination. To prevent the BAS malfunction warning indicator from

illuminating unnecessarily as a result of simultaneous brake and accelerator pedal application, the BAS control module must be inspected and

replaced. Please note that a vehicle with an illuminated BAS malfunction warning indicator should, in all cases, be brought to a Mercedes-Benz

Center for inspection and repair, as may be required, as soon as possible.

Following is the inspection and replacement procedure for the BAS control module to correct the unnecessary illumination of the BAS malfunction

warning indicator as described above Please perform this Service Campaign during the vehicle's next scheduled service visit.

Effective Serial Number Range

Inspection Procedure

1. Connect the Hand-Held Tester (HHT) to the vehicle.

2. Select: Chassis & Drivetrain/BAS/Control Module Version

3. Compare the existing BAS control module part number (appears as MB number in the control module version HHT display) to the applicable

model BAS control module part number included in the parts information table.

Note:

The 05 suffix of the BAS control module part number is not present on the BAS control module or the HHT display.

4. If the existing BAS control module part number does not match the part number for the applicable model in the parts information table,

proceed to the replacement procedure.

Replacement Procedure

1. With the ignition in the OFF position, replace the BAS control module in accordance with the applicable model in the parts information table

below. (Refer to WIS: AR42.31-P-6001A for instructions on removing and installing the BAS control module.)

150

2. Connect the HHT.

3. Read out and erase the Electronic Traction System (ETS) DTC memory.

4. Read out and erase the BAS DTC memory.

Note:

Disregard BAS DTC C1025.

5. Disconnect the HHT.

6. Start the engine and make sure no malfunction warning indicator lamps are illuminated.