Measure thickness of the brake pads - AP42.10-P-4253-01GZ

Fig 1: Identifying Gauge Adapter (164 589 10 23 00)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Brake Pad Check Gauge (211 589 06 23 00)

Courtesy of MERCEDES-BENZ USA

Measurement possible at the front axle with floating caliper brake system on

Model 164, 166, 169, 172, 203, 204, 207, 209, 212, 218, 245, 246, 251

Measurement possible at the rear axle with floating caliper brake system on

Model 164, 204, 207, 212, 216, 218, 221, 230, 246, 251

Where possible measurement to be at front axle with 6-piston and rear axle with 4-piston fixed-caliper brake system on

Model 204, 209, 212, 218, 230

Position slide (1) on the drive plate (2).
Before each measurement position the slide (1) on the drive plate (2) in order to avoid measurement errors!

Fig 3: Identifying Test Gauge Components
Courtesy of MERCEDES-BENZ USA

Measurement on front axle without test gauge adapter on vehicles with test bores
Insert measuring drift (3) in the test bore of the brake lining carrier at the outer brake pad (4).
Position the brake pad check gauge (010) on the brake lining carrier so that red ring (5) lies on flat.
Remove brake pad check gauge (010) and read off thickness of the friction lining without pad backing plate at slide (1).
Read off value on the scale with the brake lining wear symbol, otherwise a wrong value will be determined.

Fig 4: Measuring Brake Pad Thickness
Courtesy of MERCEDES-BENZ USA

Measurement on front axle without gauge adapter On vehicles without test bores, except model 164, 166, 251
Position brake pad check gauge (010) on outer brake pad (4) as shown.
Press brake pad check gauge (010) towards the brake pad (4) until as large a part as possible of the of the red ring lies on flat.
In the process the brake pad check gauge (010) must be at right angles to the friction surface of the brake disk.
Remove brake pad check gauge (010) and read off thickness of the friction lining without pad backing plate at slide.
Read off value on the scale with the brake lining wear symbol, otherwise a wrong value will be determined.

Fig 5: Positioning Brake Pad Check Gauge On Outer Brake Pad
Courtesy of MERCEDES-BENZ USA

Measurement on front axle with gauge adapter (011) for model 164, 166, 251
Pull check gauge adapter (011) out of the bracket (012) and connect up to the end stop on the measuring drift.
Mount the tip of the check gauge adapter (011) on the friction surface of the brake disk.
Position brake pad check gauge (010) on the floating brake caliper (6) as shown so that as large a part of the red ring (5) lies on flat.
In the process the brake pad check gauge (010) must be at right angles to the friction surface of the brake disk.

Fig 6: Positioning Brake Pad Check Gauge On Floating Brake Caliper
Courtesy of MERCEDES-BENZ USA
Remove brake pad check gauge (010) and read off thickness of the friction lining without pad backing plate at slide.
Read off value on the scale with the brake lining wear symbol, otherwise a wrong value will be determined.

Measurement on rear axle without test gauge adapter on vehicles with test bores

12 Insert measuring drift (3) in the test bore of the brake lining carrier at the outer brake pad (4).

13 Position the brake pad check gauge (010) on the brake lining carrier so that red ring (5) lies on flat.

14 Remove brake pad check gauge (010) and read off thickness of the friction lining without pad backing plate at slide.

Read off value on the scale with the brake lining wear symbol, otherwise a wrong value will be determined.

Fig 7: Measuring Brake Pad Thickness

Courtesy of MERCEDES-BENZ USA