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
- Engine
   Check of a compression in engine cylinders
   Check of the engine by means of the vacuum gage
   Belt of the streaming drive of auxiliary units
   + 6-cylinder petrol engines (M104.944 and M104.990/994)
   - 8-cylinder petrol engines (M119.970/981 and M119.971/981)
      Covers of heads of the block of cylinders - installation details
      Removal and installation of the inlet pipeline
      Removal and installation of a final collector
      Removal and installation of heads of the block of cylinders
      Removal and installation of covers of a chain of the GRM drive
      Replacement of a chain of the GRM drive
      Check of phases of gas distribution
      The GRM drive - the general information, service of components
      Removal and installation of the regulator of phases of gas distribution
      Removal and installation of camshafts
      Check and adjustment of control position of camshafts
      Removal and installation of valves
      Replacement of the directing plugs of valves
      Replacement of rings of saddles of valves
      Removal and installation of pistons
      Designation and sizes of pistons
      Check of a condition of rods
      Check of a condition of a bent shaft
   + 12-cylinder petrol engines (M120.980/982)
   + 6-cylinder diesel engines (OM603.971)
   + 6-cylinder diesel engines (OM606.961)
+ 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


8-cylinder petrol engines (M119.970/981 and M119.971/981)

Removal and installation of the engine


Removal and installation of the engine

1 — a cooling system Radiator
2 — the Fan
3 — a compressor drive Belt
4 — the Air filter
5 — the Basic rack
6 — the Lambda probe

7 — System of release
8 — a transmission Flange
10 — the Back support of the engine
11 — the conditioner Compressor
12 — the Forward support of the engine
13, 14 — Oil pipelines


1. Disconnect a negative wire from the battery.
2. Merge cooling liquid.
3. Disconnect the left driving cable of opening of a cowl.
4. Disconnect heater pipelines in a back part of the inlet pipeline and block of cylinders.
5. Remove the fan coupling together with the fan (2).
6. On models with the conditioner take off a belt of the drive (3).
7. Disconnect fuel-supply lines and an electrical wiring of the engine.
8. Disconnect vacuum tubes.
9. Disconnect a cable of management of a butterfly valve
10. Disconnect a vacuum tube from the vacuum amplifier of brakes.
11. Remove liquid from the tank of the pump of the amplifier of steering.
12. Disconnect pipelines from the pump of the amplifier of steering.
13. On models with the air pump disconnect the conducting socket from the pump.
14. Unscrew oil pipelines (13) and (14) from the oil heater.
15. Remove the compressor (11) together with the attached pipelines.
16. Disconnect the weeding socket from a lambda probe (6).
17. Remove system of release (7) assembled.
18. Disconnect the driveshaft from a flange of the transmission (8).
19. Having disconnected a connection wire on "mass" of the transmission.
20. Remove a back support of the engine (10).
21. Disconnect the gear shifting lever.
22. Disconnect conducting sockets from the transmission.
23. Turn off bolts of fastening (12) of the engine in front.
24. Attach eyes to the engine.
25. Install the engine at an angle and take it.


Adjust a gear shifting cable. Check idling turns. Check and fill in oil and cooling liquid. Start the engine and be convinced of lack of leaks.