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Home >> Mercedes Benz >> 2023 >> CLS450 >> Repair and Diagnosis >> Brakes >> Brakes Control Systems >> Brakes - Hydraulic & Mechanical System - 257 Chassis 1 Of 2 >> Testing & Repair >> Remove/Install Brake Disc - AR42.10-P-0220FR

Remove/Install Brake Disc - AR42.10-P-0220FR

Model 257 

Fig 1: Brake Disc Components Location - Model 257 (Shown On Front Axle 1-Piston Floating Caliper Brake)
G14548929Courtesy of MERCEDES-BENZ USA

Shown on front axle 1-piston floating caliper brake 

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
Notice  Notes on self-locking nuts and bolts   AH00.00-P-0001-01KOA
Notice  Notes on repairs to Brake system   AH42.00-P-0003-01A 
Notice  Notes on handling, transport and storage of composite Brake disks   AH42.10-P-9406-12LF 
  Notes on safety-relevant components   AH00.00-Z-0019-01A
REMOVING Remove     
1.1 Remove Brake caliper with brakepads from front axle and fasten with attached lines free of tension to the vehicle. Model 257 4-piston fixed-caliper Brake When removing front Brake disk (2).  
    Model 257.361 4-piston fixed-caliper brake AR42.10-P-0070FRB 
    Model 257 (except 257.361) 4-piston fixed-caliper brake AR42.10-P-0070FRA 
1.2 Remove front Brake caliper support. Model 2571-piston floating caliper Brake When removing front Brake disk (2).  
      AR42.10-P-0222FR 
2 Remove rear Brake caliper support. When removing rear Brake disk (2).  
      AR42.10-P-0221FR 
3 Unscrew safety screw (1) and remove Brake disk (2).    
INSTALLING Install     
4 Clean contact surface (3) and interference fit (4). NOTES
Do not use sharp-edged or pointed objects. Otherwise, the contact surface (3) and interference fit (4) will be damaged.
 
    Assembly cleaner *BR00.45-Z-1028-04A 
5 Lightly grease interference fit (4) of Brake disk (2). Paste, hot lubrication 1 kg, DBL 6879.20 *BR00.45-Z-1005-06A 
6 Position Brake disk (2) and tighten safety screw (1). IMPORTANT Replace safety screw (1).  
    TORQUE SPECIFICATION Locking bolt, Brake disk of front axle to wheel hub *BA42.10-P-1002-06J 
    TORQUE SPECIFICATION Safety bolt, rear axle Brake disk to flange *BA42.10-P-1001-06J 
7 Install Brake caliper support at rear. When installing rear Brake disk (2).  
      AR42.10-P-0221FR 
8.1 Install Brake caliper support at front. Model 2571-piston floating caliper Brake When installing front Brake disk (2). AR42.10-P-0222FR 
8.2 Install Brake caliper. Model 257 4-piston fixed-caliper Brake When installing front Brake disk (2).  
    Model 257.361 4-piston fixed-caliper brake AR42.10-P-0070FRB 
    Model 257 (except 257.361) 4-piston fixed-caliper brake AR42.10-P-0070FRA 
BRAKE DISKS, BRAKE COVER PLATE

Number Designation Model 257
BA42.10-P-1001-06J Safety bolt, rear axle Brake disk to flange Nm 10
BRAKE DISKS, BRAKE COVER PLATE

Number Designation Model 257
BA42.10-P-1002-06J Locking bolt, Brake disk of front axle to wheel hub Nm 10
REPAIR MATERIALS

Number Designation Order number
BR00.45-Z-1005-06A Paste, hot lubrication 1 kg, DBL 6879.20 A 000 989 76 51
BR00.45-Z-1028-04A Assembly cleaner A 000 986 56 01