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

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

• model 164, 169, 203, 204, 209, 245, 251

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

• Model 164, 204, 216, 221, 230, 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, 230

1. 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 Brake Pad Gauge, Brake Lining Wear Symbol And Bracket

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

   Measurement on front axle without gauge adapter (011) on model 169, 204, 245 

2. Insert measuring drift (3) in the test bore of the brake lining carrier at the outer brake pad (4).
3. Position the brake pad check gauge (010) on the brake lining carrier so that red ring (5) lies on flat.
4. Remove the brake pad check gauge (010) and read off the measured value on the slide (1).

   Read off the value on the scale provided with the brake lining wear symbol (A) otherwise a false value will be determined!

   Fig 4: Measuring Brake Pads Thickness

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Measurement on front axle without gauge adapter (011) 

Measurement on front axle without gauge adapter (011) On model 203, 209 as well as model 204, 230 with 6-pistonfixed brake calipers and measurement at the rear axle on vehicles with 4-piston-fixed brake calipers 

1. 2 Position brake pad check gauge (010) on outer brake pad (4) as shown.
2. 3 Press brake pad check gauge (010) towards the brake pad (4) until as large a part as possible of the 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.

3. 4 Remove the brake pad check gauge (010) and read off the measured value on the slide (1).

   Read off the value on the scale provided with the brake lining wear symbol (A) otherwise a false value will be determined!

   Fig 5: Measuring Brake Pads Thickness

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Measurement on front axle with gauge adapter (011) on model 164, 251 

1. 2 Pull check gauge adapter (011) out of the bracket (012) and connect up to the end stop on the measuring drift (3).
2. 3 Mount the tip of the check gauge adapter (011) on the friction surface of the brake disk.
3. 4 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.

4. 5 Remove the brake pad check gauge (010) and read off the measured value on the slide (1).

   Read off the value on the scale provided with the brake lining wear symbol (A) otherwise a false value will be determined!

   Fig 6: Measuring Brake Pads Thickness

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Measurement on rear axle without gauge adapter (011) on model 164, 204, 216, 221, 230, 251 except vehicles with 4-piston fixed-caliper brake system 

1. 2 Insert measuring drift (3) in the test bore of the brake lining carrier at the outer brake pad (4).
2. 3 Position the brake pad check gauge (010) on the brake lining carrier so that red ring (5) lies on flat.
3. 4 Remove the brake pad check gauge (010) and read off the measured value on the slide (1).

   Read off the value on the scale provided with the brake lining wear symbol (A) otherwise a false value will be determined!

   Fig 7: Measuring Brake Pads Thickness

   Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Designation			Model 164
Brake disk thickness	New (with pad backing plate)	mm	19.75
	New (without pad backing plate)	mm	14
	Wear limit (without pad backing plate)	mm	≤ 2
		Wear limit (with pad backing plate) for maintenance service	≤ 11.8
	Wear limit (without pad backing plate for maintenance service)	mm	5.8
	Wear indicator activated (if installed)	mm	2-3
	-	-	-

Designation			Model 164
Brake disk thickness	New (with pad backing plate)	mm	17
	New (without pad backing plate)	mm	12
	Wear limit (without pad backing plate)	mm	≤ 2
		Wear limit (with pad backing plate) for maintenance service	≤ 10
	Wear limit (without pad backing plate for maintenance service)	mm	5
	Wear indicator activated (if installed)	mm	2-3
	-	-	-