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Home >> Mercedes Benz >> 2020 >> CLA250 Base >> Repair and Diagnosis >> Brakes >> Brakes Control Systems >> Brakes -- Hydraulic & Mechanical System (1 Of 2) -- 118 Chassis >> Testing & Repair >> Remove/Install Front Axle Brake Caliper >> Remove/Install Front Axle Brake Caliper - AR42.10-P-0070MFA

Remove/Install Front Axle Brake Caliper - AR42.10-P-0070MFA

Model 118 (except 118.351/353/354/651/653/654), 177 (except 177.051/053/054/151/951), 243, 247 (except 247.651/751/753/754) 

1-piston floating caliper brake 

MODIFICATION NOTES

23.05.2023 Work procedure adapted.    

Shown on model 177.0 on 1-piston floating caliper brake 

Fig 1: Front 1-Piston Floating Brake Caliper Components Location - Model 118 (Except 118.351/353/354/651/653/654) (Shown On Model 177.0)
G16050057Courtesy of MERCEDES-BENZ USA
DANGER Risk of accident  when commissioning the vehicle due to a lack of braking effect when the service brake is operated for the first time after repair work. Before starting the engine, actuate brake pedal several times until pressure is built up and maintained in the brake system. AS42.50-Z-0002-01A 
WARNING Risk of injury  . Moving parts can pinch, crush or, in extreme cases even sever extremities. No parts of the body or limbs should be within the operating area of mechanical components when moving components. AS00.00-Z-0009-01A
WARNING Risk of injury  . Skin or eye injuries may result when handling hot or glowing objects. Wear protective gloves, protective clothing and safety glasses, if necessary. AS00.00-Z-0002-01A
CAUTION Risk of poisoning  from swallowing brake fluid. Risk of injury  from skin and eye contact with brake fluid Only pour brake fluid into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid. AS42.50-Z-0001-01A 
Notice  Notes on avoiding damage through contamination and foreign objects   AH00.00-P-5000-01A
Notice  Notes on threaded connections fastened using a tightening angle-based tightening process   AH00.00-P-0020-01A
Notice  Notes on externally invisible brake fluid loss   AH42.10-P-9406-02A 
Notice  Brake fluid notes   AH42.50-P-0001-01A 
Notice  Notes on repairs to brake system   AH42.00-P-0003-01A 
Notice  Notes on self-locking nuts and bolts   AH00.00-P-0001-01KOA
  Notes on safety-relevant components   AH00.00-Z-0019-01A
REMOVINGINSTALLING Remove/install     
1 Remove brake hose (3). INSTALLATION IMPORTANT Replace brake hose (3).
Always replace brake hose (3) after removal.
AR42.10-P-0013MFA 
2 Remove brake linings. INSTALLATION IMPORTANT Brake paste or other lubricants must not be applied to the brake pads. AR42.10-P-1610MFA 
3 Remove screw (2) and remove brake caliper (1). INSTALLATION NOTES
Do not damage electrical line of right front brakepad wear sensor (S10/2).
Otherwise, function of the right front brakepad wear sensor (S10/2) is not guaranteed.
 
    TORQUE SPECIFICATION Bolt, guide pin to brake caliper *BA42.10-P-1002-10ZA 
INSPECT Check     
4 Check brake caliper (1) for damage. If there is a problem,

replace brake caliper (1).
 
5 Check dust boot at brake piston for damage. If there is a problem,

replace brake caliper (1).
 
6 Check brake caliper support (4) for damage. If there is a problem,

replace brake caliper support (4).
 
    TORQUE SPECIFICATION Bolt, brake caliper/brake caliper support to steering knuckle *BA42.10-P-1001-10ZA 
7 Install in the reverse order.    
8 Operate brake pedal several times until the brake pads contact the brake disks. IMPORTANT Firm resistance should be noticeable at the brake pedal.  
9 Perform brake test on test stand.    
REFER TO MAINTENANCE   Model 243 AP42.00-P-4290EQ
REFER TO MAINTENANCE   Model 118 (except 118.351/353/354/651/653/654), 177 (except 177.051/053/054/151/951), 247 (except 247.651/751/753/754) 1-piston floating caliper brake AP42.00-P-4290BA
FRONT AXLE BRAKE CALIPER

Number Designation Model 118 Model 177
BA42.10-P-1001-10ZA Bolt, brake caliper/brake caliper support to steering knuckle M12     120 120
M14 Stage 1 Nm 80 80
  Stage 2 ∠° 45 45
FRONT AXLE BRAKE CALIPER

Number Designation Model 243 Model 247
BA42.10-P-1001-10ZA Bolt, brake caliper/brake caliper support to steering knuckle M12       120
M14 Stage 1 Nm 80 80
  Stage 2 ∠° 45 45
FRONT AXLE BRAKE CALIPER

Number Designation Model 118 Model 177
BA42.10-P-1002-10ZA Bolt, guide pin to brake caliper M8 Nm 30 30
M10 Nm 65 65
FRONT AXLE BRAKE CALIPER

Number Designation Model 243 Model 247
BA42.10-P-1002-10ZA Bolt, guide pin to brake caliper M8 Nm - 30
M10 Nm 65 65