Mercedes M-Class W163

since 1997 release

Repair and operation of the car

Brake and auxiliary systems

Specifications

Separate characteristics are provided also in the text of the Head and in case of obligation of their performance are highlighted in bold type.

General parameters
Drive type	Hydraulic, double-circuit (with diagonal division) with the vacuum amplifier. Electronic antistrange system (ESP), amplifier of emergency brake application (BAS) and system of anti-blocking of brakes (ABS)
Brake mechanisms	Disk, ventilated, with the fixed or floating support
Parking brake	With a pedal trosovym the drive on brake mechanisms of back wheels
Brake mechanisms of forward wheels
Thickness of frictional overlays of blocks, mm
Models with a floating support
Nominal rate (a new block taking into account a substrate)
Internal block	18.5
External block	15.5
Extreme admissible value (taking into account a substrate - for THAT)
Internal block	12
External block	11
Operation of the indicator of wear near	2
Models with the fixed support
Nominal rate (a new block taking into account a substrate)	17.5
Extreme admissible value (taking into account a substrate - for THAT)	11
Operation of the indicator of wear near	1.7
Thickness of a brake disk, mm
Models with a floating support
Nominal rate	25
Extreme admissible value	23
Extreme admissible value when passing THAT	23.5
Models with the fixed support
Nominal rate	32
Extreme admissible value	29.4
Extreme admissible value when passing THAT	30
Brake mechanisms of back wheels
Thickness of frictional overlays of blocks, mm
Models with a floating support
Nominal rate (a new block taking into account a substrate)	15.5
Extreme admissible value
Taking into account a substrate (for THAT)	11
Without a substrate	5
Models with the fixed support
Nominal rate (a new block taking into account a substrate)	15.5
Extreme admissible value
Taking into account a substrate (for THAT)	11
Without a substrate	2
Operation of the indicator of wear near	1.7
Thickness of a brake disk, mm
Models with a floating support
Nominal rate	15
Extreme admissible value	13
Extreme admissible value when passing THAT	13.5
Models with the fixed support
Nominal rate	14
Extreme admissible value	12
Extreme admissible value when passing THAT	12.5
Parking brake
Control effort of squeezing of a pedal of a foot brake, N	^{170 +70/-50}
The number of clicks of a ratchet when squeezing a pedal of raising of the parking brake
Pedal assembly with an exhaust ratchet	1
Pedal assembly with a release ratchet	5
Vacuum amplifier of brakes
Diameter of the vacuum amplifier, mm	279
Strengthening coefficient	5.6
Pressure in brake lines (with a depth of depression of 0.75 ÷ of 0.8 bars), bar
At effort of squeezing of a pedal of a foot brake:
50 N	9 ÷ 20
100 N	36 ÷ 48
150 N	53 ÷ 68
200 N	70 ÷ 85
250 N	82 ÷ 96
Efforts of tightening of threaded connections, H · m
Wheel nuts	150
GTTs tank cover	2
Gates of pumping of supports of brake mechanisms	18
Nut of fastening of the left forward support of a suspension bracket of the power unit to an arm on the engine	65
Nuts of fastening of assembly of the brake amplifier on a partition of a motive compartment	25
Nipple knots of connection of brake lines to assembly of GTTs	20
Nuts of fastening of assembly of GTTs to the block of the brake amplifier	25
Nipple knots of connection of brake lines to the ASR/ETS hydromodulator	15
Nipple knots of fastening of flexible hoses to brake tubes	18
Nipple knots of connection of brake hoses to supports	18
Hollow bolts of nipple sockets of connection of brake hoses to supports	33
Bolts of fastening of contact sensors of brake shoes on the fixed supports	9
Самоконтрящиеся bolts of fastening of brake supports of brake mechanisms of forward wheels to rotary fists	180
Самоконтрящиеся bolts of fastening of brake supports of brake mechanisms of back wheels to stupichny assemblies	115
Bolts of fastening of a pedal of the drive of the parking brake to a forward rack	12
Самоконтрящиеся bolts of fastening of wheel sensors	8