Disc Brake System: By Symptom
Brakes - Front/Rear Brakes Squealing Noise
Date: June 1, 2009
Order No.: P-B-42.10/76b
Supersedes: P-B-42.10/76a dated Dec. 19, 2007
Group: 42
Revision History
Revision Date Purpose
b 6/1/09 Applicable Models Updated (211.277 added)
a 12/19/07 Content Updated to Include Front Axle
- 7/19/07 Initial issue
SUBJECT:
Model 211.077/277
Model 219.377
Model 230.472/479
Model Year 2006 - 2008
Front or Rear Axle Brake Squeal
If you receive customer reports in the above model vehicles of brake squeal emanating from the front and or rear axle area, replace the original brake
pads with revised parts.
Note:
The brake squeal predominately occurs when the brake is applied lightly in city traffic conditions. The intensity of the noise varies depending on the
frequency of the frictional vibrations of the brake system.
Note:
Brake paste must not be used on the front or rear brake pads and or calipers. The addition of brake paste on these specific model's brake components
may actually create and or intensify brake squeal.
Front Brakes
Note:
The revised style front brake pads can be differentiated from the original pads by the addition of two mass dampers (Figure 1, circles). The revised
pads have been implemented into series production as of the following VINs: 211 = A995068, 219 = A082635 and 230 = F125253.
1. Remove existing brake pads. Refer to WIS document AR42.10-P-1600TX (219) or AR42.10-P-1600RA (211 / 230).
2. Clean brake caliper in the area where the brake pads are positioned.
3. Install revised brake pads. Refer to WIS document AR42.10-P-1600TX (219) or AR42.10-P-1600RA (211 / 230).
Note:
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2007 Mercedes Benz SL 65 AMG (230.479) V12-6.0L Turbo (275.981)
For vehicles which were not originally equipped with the revised style front brake pads, a pair of pins and a retaining spring will also be required for installation.
Rear Brakes
Note:
The original style rear brake pads can be differentiated from the revised pads by the stainless steel shim. The original pad's shim is completely solid
(Figure 2), where as the revised shim has two semicircular shapes cut out (Figure 3).
1. Remove existing brake pads. Refer to WIS document AR42.10-P-1700TZ (219) or AR42.10-P-1700RA (211 / 230).
2. Clean brake caliper in the area where the brake pads are positioned.
3. Install revised brake pads. Refer to WIS document AR42.10-P-1700TZ (219) or AR42.10-P-1700RA (211 / 230).
Note:
The improved pads must be installed in the correct orientation. There is an arrow (Figure 4, circle) on the pad's stainless steel shim which must be
installed in the forward rotational direction of the brake disc (vehicle driving forward).
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2007 Mercedes Benz SL 65 AMG (230.479) V12-6.0L Turbo (275.981)
Parts Information
Note:
The following allowable labor operations should be used when submitting a warranty claim for this repair. This information has been generated on
June 1, 2009. Please refer to Netstar --> Star TekInfo --> Star Time for the most current labor time allowance.
In Case of Warranty, use the table above.
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