E 350 4MATIC Sedan (211.087) V6-3.5L (272.972) (2006)
Hydraulic Control Assembly - Antilock Brakes: All Technical Service Bulletins
Brakes - Buzzing Noise During SBC Pressure Build Up
Date: November 15, 2007
Order No.: P-B-42.46/27e
Supersedes: P-B-42.46/27d dated June 16, 2004
Group: 42
Revision History
Revision
Date
Purpose
e
11/15/07
Applicable Models, Content, Parts and Warranty Information Updated
d
6/16/04
Applicable Models Updated
C
12/12/03
Production Range Included and Procedure Updated
b
10/21/03
VIN Range Included
a
3/12/03
Warranty Operation Code Corrected
-
3/10/03
Initial issue
SUBJECT:
Model 211.026/056/065/070/076/082/083/087/256/265/276/282/283/287
Model 219.375/376
Model Year 2003 - 2006
Buzzing Noise During Pressure Buildup from SBC System
If you receive customer reports in the above model vehicles of a humming / buzzing drone noise during pressure buildup of the SBC system,
perform the following.
Note:
The single suction damper (A000 431 04 77) is being replaced by a suction hose with integral double suction dampers.
Warning!
Work on the SBC system must be carried out by properly trained personnel. Reference WIS document S142.46-P-0001D.
1.
Deactivate the SBC system with Star Diagnosis.
2.
Extract the brake fluid from the reservoir completely.
3.
Pull the suction hose off the SBC hydraulic unit by using a mounting wedge (W110 589 03 59 00).
Warning!
Never use a sharp-edged tool to pull off the suction hose; this can potentially damage the suction line attached to the vehicle and cause the
SBC brake system to malfunction.