Mercedes S-Class W-220

since 1998 release

Repair and operation of the car

Mercedes W220
+ Mercedes-Benz cars of the class S (W220)
+ Operation manual
- Routine maintenance
   Active system of the warning of the term of approach planned THAT (ASSYST)
   Schedule of routine maintenance
   General information on control
   Check of levels of liquids, control of leaks
   Check of a condition of tires and pressure in them. Designation of tires and disks of wheels. Rotation and replacement of wheels
   Replacement of motive oil and oil filter
   Check of the brake system
   Check of fuel system
   Check of a state and replacement of hoses of a motive compartment, localization of leaks
   Check of a condition of ridge belts of the streaming drive of auxiliary units
   Check of functioning of the cooling system and frost resistance of cooling liquid. Liquid replacement
   Check of a condition of system of production of the fulfilled gases
   Check of level of oil of automatic transmission
   Visual check of tightness of automatic transmission
   Check of a state component of a suspension bracket and steering
   Check of a condition of protective covers of power shafts
   Check of level of liquid of system of hydrostrengthening of a wheel
   Check of the air conditioning system
   Lubricant of limiters of doors and cylinder of the lock
   Visual control of a seat belt and block of a safety cushion
   Check of operability of headlights and horn
   Check of a state, adjustment and replacement of brushes of screen wipers
   Check of a condition of the battery, care of it and charging
   Replacement of an element of the filter of air of salon / coal filter of purification of air
   Replacement of brake fluid
   Check and replacement of spark plugs. Check of a condition of high-voltage wires
+ Engine
+ Cooling system and heating
+ Power supply system and release
+ Engine electric equipment
+ Automatic transmission
+ Power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Schemes of electric equipment

Check of the brake system

The dust which is formed as a result of wear of slips and accumulating on components of the brake mechanism may contain asbestos hazardous to health. Do not blow this dust by means of compressed air and do not inhale it! Do not use solvents on the basis of gasoline for removal of dust. Dust should be washed away a special cleaner of the brake system or methyl alcohol in drain capacity. After rubbing the component of the brake system a damp rag this rag and contents of drain capacity should be held in the closed and signed container. Further whenever possible try to use the components which are not containing asbestos.

Except checks through the established time intervals a condition of brake mechanisms it is necessary to carry out every time at removal of wheels or at emergence of signs of malfunction in system. For driving safety the procedures of check of the brake system described below are the most important of all procedures for service of the car made by you.

Signs of malfunctions in the brake system


1. Disk brake mechanisms can have the built-in indicators of wear of frictional slips which signal that wear of slips reached critical size. At the same time slips should be changed immediately, otherwise brake disks will be damaged and they will need expensive repair.
2. Any of the listed below signs can indicate potential defect of the brake system:

  1. When squeezing a pedal of a brake the car "takes away" in one party
  2. Brake mechanisms when braking make the scraping or squealing sounds
  3. The pedal of a brake has the excessive course
  4. The pedal of a brake pulses (it normally only during the work of the ABS system)
  5. Leak of brake fluid is observed (usually on inside of the tire or a wheel)
3. In case of detection at least of one of these signs immediately examine the brake system.

Brake lines and hoses


In the brake system steel brake tubes, except for the flexible reinforced hoses at forward wheels and as connections at the back bridge are generally used. Regular survey of all these lines is very important.

1. Park the car on the flat platform and switch off the engine. Take off caps from wheels. Weaken, but do not remove bolts of fastening of all four wheels.
2. The car and reliably establish to Poddomkratta it on support.
3. Remove wheels (address the Section Check of a Condition of Tires and Pressure in them. Designation of tires and disks of wheels. Rotation and replacement of wheels and to the head's materials Operation manual).
4. Check all brake lines and hoses for existence of cracks and attritions in their external covering, leaks, swellings and deformations. Check brake hoses in forward and back parts of the car for existence of signs of a softening, cracks, deformations or wear as a result of friction about other components. Check all nipple connections for existence of signs of leaks and make sure of reliability of fastening of all bolts and clips of brake hoses.

5. Bend hands in one and other parties a brake hose to reveal damages. It is not necessary to twist hoses. Watch the direction of the color line put on a hose!

6. Turn a steering wheel to the right and to the left against the stop. Hoses should not touch car design elements at the same time.
7. At detection of leak of liquid or their damages it is necessary to eliminate immediately. For more detailed description of the procedure of repair of the brake system address the Head the Brake system.

Check of thickness of brake shoes

Thickness of external brake shoes can be checked through an aperture in a wheel disk by means of a pocket small lamp.

The internal block can be checked by means of a pocket small lamp and a mirror. If it is necessary to estimate more precisely block thickness, it is necessary to remove a wheel and to measure a block by a caliper.

Disk brake of a forward wheel

Experience shows that wear of a brake shoe of a wheel from the forward passenger is more, than from the driver.

Therefore for check of thickness of a brake shoe it is recommended to remove a wheel from the forward passenger.


1. Mark paint the provision of a forward wheel in relation to a nave. It will allow to establish the balanced wheel in the working situation. Weaken bolts of fastening of a wheel. At the same time the car has to stand on the earth.
2. Lift a forward part of the car and establish on supports. Remove a forward wheel.

3. Measure by a caliper thickness of a block and with a metal lining on internal and external brake shoes.

4. Thickness of 7 mm is considered a limit of wear of a forward block (with a basis plate). In this case the brake shoe needs to be replaced, address the Head the Brake system.
5. Establish a forward wheel so that the markings put at removal coincided. Do not grease bolts of fastening of wheels. Establish bolts of fastening of a wheel.
6. Lower the car on wheels and tighten bolts.

By experience, 1 mm of wear of a brake shoe corresponds to at least 1000 km of a run of the car. This rule corresponds to adverse service conditions of the car. In normal conditions wear of blocks is much less. At a thickness of block of 10.0 mm (with a basis plate) the block can be operated still not less than 3000 km.

Disk brake of a back wheel


1. Check thickness of an external brake shoe through an aperture in a wheel disk, having used if necessary a pocket small lamp. The disk of a wheel does not need to be removed. If there is a wheel cap, it needs to be removed.
2. Check an internal block by means of a lamp and a mirror.
3. A limit of wear of a brake shoe of back and forward wheels thickness of 7 mm, including a basis plate is considered.

Parking brake

To protozoa, and it is possible, the most obvious way of check of operation of the parking brake is installation of the car on a steep slope with the cocked brake and transmission in neutral situation (when checking you should be in the car). If the parking brake does not keep the car from rolling, it is necessary to make its adjustment as it is described in the Head the Brake system.