Mercedes S-Class W-140

1991-1999 of release

Repair and operation of the car



Mercedes S-Class
+ Mercedes-Benz cars of the class S (W-140)
+ Operation manual
- Routine maintenance
   Specifications
   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 of wheels
   Replacement of motive oil and oil filter
   Check of the brake system
   Check of fuel system, replacement of the fuel filter
   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 the ATF level, replacement of the AT filter
   Visual check of tightness of automatic transmission
   Check of a condition of components of a suspension bracket and steering
   Check of a condition of protective covers of power shafts
   Check of the air conditioning system
   Lubricant of limiters of doors and cylinders of locks
   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 the saloon filter
   Replacement of brake fluid
   Check and replacement of spark plugs, check of a condition of high-voltage wires (petrol models)
+ Engine
+ Cooling systems, heating
+ Power supply system and release
+ Engine electric equipment
+ Gear shifting box
+ Automatic transmission
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment






Check of a condition of ridge belts of the streaming drive of auxiliary units

Check of a belt of the streaming drive of auxiliary units

Schemes of laying of a belt of the streaming drive of auxiliary units

The scheme of laying of a belt of the streaming drive of auxiliary units on the S280 and S320 models

1 — the Tension roller with a natyazhitel
2 — the Bent shaft
3 — the conditioner Compressor
4 — the Fan
5 — the Air pump

6 — the Generator
7 — the Directing roller
8 — the Pump of the hydraulic booster of steering
9 — the Water pump
10 — the Air pump


The scheme of laying of a belt of the streaming drive of auxiliary units on the S420 and S500 models

1 — the Tension roller with a natyazhitel
2 — the Bent shaft
3 — the conditioner Compressor
4 — the Fan
5 — the Air pump

6 — the Generator
7 — the Directing roller
8 — the Pump of the hydraulic booster of steering
9 — the Water pump
10 — the Air pump


The scheme of laying of a belt of the streaming drive of auxiliary units on the S600 models

1 — the Tension roller with a natyazhitel
2 — the Bent shaft
3 — the conditioner Compressor
4 — the Fan
5 — the Air pump

6 — the Generator
7 — the Directing roller
8 — the Pump of the hydraulic booster of steering
9 — the Water pump
10 — the Air pump


The scheme of laying of a belt of the streaming drive of auxiliary units on the S300TDI models

1 — the Tension roller with a natyazhitel
2 — the Bent shaft
3 — the conditioner Compressor
4 — the Fan
5 — the Air pump

6 — the Generator
7 — the Directing roller
8 — the Pump of the hydraulic booster of steering
9 — the Water pump
10 — the Air pump


Fingers (and using a small lamp if it is necessary) walk on all length of a belt, feeling on existence of cracks and stratifications. Also check whether is not present on a belt of attritions and sites, zapolirovanny to gloss. The belt has to be examined on both sides that means need of its twisting for check of a condition of inner side. Be in passing convinced of lack of a rust, cracks and agnails on pulleys. On a working surface of a belt existence of superficial perpendicular cracks is allowed. If these cracks do not overstep the bounds of one edge and not really deep, to replace a belt there is no need.

Check of a belt of the drive of auxiliary units

A — the New belt
B — Wear of walls - edges are pointed (at new belts they trapezoidal)
With — Stripping of a cord
D — Cracks on a back part of a belt
E — Peeling of rubber from a basis
F — Wear of an external cord

G — the Rupture of a side cord
H — Cracks across edges
J — Injury of edges
K — Cracks of separate edges
L — Pollution or jamming of stones between edges
M — Vyryvany rubbers on edges


The tension of a ridge belt is made automatically. It is necessary to check periodically a condition of a belt, and at detection of defects, to replace a belt.

The tension of a belt is carried out by an automatic natyazhitel and does not need check.

 PERFORMANCE ORDER

1. Switch off the engine, establish transmission in neutral situation. Lift and install the car on supports.
2. Mark chalk a belt on well foreground.
3. A head turn the engine for a pulley of a bent shaft in the direction of rotation, i.e. to the right side so that cretaceous marking was visible. At the same time the site behind the site see a belt.


Establishing a driving belt, correctly place it on pulleys - it has to be strictly on the center of a pulley (even short-term work of incorrectly established belt can lead to its damage)


The tension of a belt can be checked by strong pressing for it by a thumb and definitions of degree of its deflection. Measure the size of a deflection by a ruler. If the distance between centers of pulleys makes from 180 to 280 mm, then the size of a deflection has to equal 6 mm. If the distance between centers of pulleys is in limits between 300 and 400 mm, the deflection has to be 13 mm.

In the presence of one or several of the specified damages maple the belt needs to be replaced with new.