Brake system

Chapter overview

• Technical data
  1
• 1 Notes on safety
  1
• 1.1 Safety precautions when working on vehicles with high-voltage system
  1
• 1.2 Safety precautions during a road test using test and measuring equipment
  2
• 2 Technical data
  3
• 2.1 Technical data for brakes
  3
• 2.2 Optical characteristics of the ceramic brake disc
  5
• Anti-lock brake system
  7
• 1 General information
  7
• 1.1 Repair instructions for repair work on ABS
  7
• 2 Overview of fitting locations
  10
• 2.1 Overview of fitting locations - ABS/ESP
  10
• 3 Control unit and hydraulic unit
  12
• 3.1 Assembly overview - control unit and hydraulic unit
  12
• 3.2 Removing and installing ABS control unit J104 / ABS hydraulic unit N55
  13
• 4 Sensors
  18
• 4.1 Assembly overview - speed sensor on front axle
  18
• 4.2 Assembly overview - speed sensor on rear axle
  19
• 4.3 Removing and installing speed sensors on front axle G45 / G47
  20
• 4.4 Removing and installing speed sensors on rear axle G44 / G46
  20
• 4.5 Removing and installing ESP sensor unit G419
  21
• Brakes - mechanism
  22
• 1 Front brakes
  22
• 1.1 Assembly overview - front brakes
  22
• 1.2 Removing and installing brake pads or linings
  24
• 1.3 Removing and installing brake caliper
  26
• 2 Rear brakes
  30
• 2.1 Assembly overview - rear brakes
  30
• 2.2 Removing and installing brake pads or linings
  32
• 2.3 Removing and installing brake caliper
  34
• 3 Parking brake
  39
• 3.1 Overview of fitting locations - parking brake
  39
• 3.2 Removing and installing control unit for electromechanical parking brake J540
  40
• 4 Brake pedal
  41
• 4.1 Assembly overview - brake pedal
  41
• 4.2 Separating brake pedal from brake servo
  41
• 4.3 Removing and installing brake pedal
  42
• 4.4 Connecting brake pedal to brake servo
  45
• 4.5 Removing and installing mounting bracket
  45
• Brakes - hydraulics
  48
• 1 Brake servo and brake master cylinder
  48
• 1.1 Assembly overview - brake servo/brake master cylinder
  48
• 1.2 Removing and installing brake light switch F
  49
• 1.3 Removing and installing brake master cylinder
  50
• 1.4 Removing and installing brake servo
  52
• 2 Vacuum system
  56
• 2.1 Assembly overview - vacuum pump
  56
• 2.2 Removing and installing brake servo pressure sensor G294
  56
• 2.3 Checking vacuum system
  57
• 3 Brake lines
  65
• 3.1 Repairing brake lines
  65
• 4 Hydraulic system
  70
• 4.1 General notes on brake fluid
  70
• 4.2 Bleeding hydraulic system following standard procedure
  70
• 4.3 Subsequent bleeding of hydraulic system
  71
• 4.4 Testing for leaks
  72