SL 55 AMG (230.474) V8-5.5L SC (113.992) (2003)
Hydraulic Control Assembly - Antilock Brakes: Customer Interest
ABS System - Buzzing/Droning Noises
Date: April 24, 2003
Order No.: P-B-42.46/28
Supersedes:
Group: 42
SUBJECT:
Model 230.474/475, Model Year 2003
Buzzing/Droning Noises During Pressure Buildup of SBC System
If you receive customer reports in the above models of buzzing / droning noises from the SBC system, please perform the following procedure.
Caution:
Only trained workshop personnel should perform service on the SBC system. Reference WIS document SI42.46-P-0001D.
1)
Using STAR Diagnosis deactivate the SBC system. Reference WIS document AS42.46-Z-0001-01A.
2)
Install and tighten service tool clamp (part number 000 589 40 37 00) on the suction line approximately 15 cm (6 inches) from the SBC hydraulic
unit in order to minimize brake fluid loss (Figure 1).
3)
Loosen hose clamp for the suction line at the SBC hydraulic unit fitting and remove hose.
4)
Cut off approximately 6.5 cm (2.5 inches) from the end of the suction line.
Note:
Ensure that the cut hose surface is clean and straight with no textile cords protruding. Additionally ensure that no debris gets into the suction line.
Note:
Do not discard the 6.5 cm length of hose previously cut-off the suction line, it will be reused in a later step.
5)
Cut off approximately 3 cm (1-3/16 inches) from the end of the clamped suction line (vehicle side). This section of hose will not be reused and can
be discarded.
Note:
Ensure that the cut hose surface is clean and straight with no textile cords protruding. Additionally ensure that no debris gets into the suction line.