Mercedes S-Class W-140

1991-1999 of release

Repair and car operation

Mercedes S-Class
+ Mercedes-Benz Cars of a class S (W-140)
+ Operation manual
+ Routine maintenance
- Engine
   Compression check in engine cylinders
   Engine check by means of the vacuum gage
   Belt of a streaming drive of auxiliary units
   - 6-cylinder petrol engines (M104.944 and M104.990/994)
      Cover of a head of the block of cylinders - installation details
      Removal and installation of the inlet pipeline with the resonator (except the engine 104.990)
      Final collector (except the engine M 104.990) - installation details
      Removal and installation of a head of the block of cylinders
      Removal and installation of a cover of a chain of a drive of GRM
      GRM drive - the general information, service of components
      Asterisk of a cranked shaft - installation details
      Removal and installation of a regulator of a camshaft
      Removal and installation of camshafts
      Replacement of directing plugs of valves
      Replacement of saddles of valves
      Removal and installation of pistons
      Replacement of piston rings
      Check of a condition of rods
      Check of a condition of a cranked shaft
      Service of the block of cylinders
      Removal and installation of the pallet of a case of the engine
      The oil pump - installation details
      The sensor switch of level of oil - installation details, verifying data
   + 8-cylinder petrol engines (M119.970/981 and M119.971/981)
   + 12-cylinder petrol engines (M120.980/982)
   + 6-cylinder diesel engines (OM603.971)
   + 6-cylinder diesel engines (OM606.961)
+ Systems of cooling, heating
+ Power supply system and release
+ engine Electric equipment
+ gear shifting Box
+ Avtomaticheckaya transmission
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment


6-cylinder petrol engines (M104.944 and M104.990/994)

Removal and engine installation


Removal of pump assembly

1 — the Pump
2 — the Basic arm
3 — Bolts М8 of fastening of pump assembly


1. Disconnect a negative wire from the battery.
2. On models with the conditioner: attach a protective plate to the conditioner condenser. Disconnect oil pipelines from an oil radiator.
3. Unscrew collars of fastening of oil pipelines to a body.
4. Remove a belt of a drive of the compressor of the conditioner.
5. Pump out liquid from the tank of the amplifier of a steering by means of the pump.
6. Disconnect the conditioner compressor from the engine. For this purpose unscrew bolts (35) and nuts of fastenings of pipelines. Fix the compressor sideways in the lower part of an impellent compartment with the attached pipelines.
7. Unscrew returnable and forcing pipelines from the pump of the amplifier of a steering and the double pump of a high pressure.
8. Unscrew forcing pipeline from the pump (1), unscrew bolts М8 (3) fastenings of the pump to an arm (2) and disconnect forcing pipeline from clamps.
9. Open a cover of a jellied mouth of a fuel tank for pressure decrease in a power supply system. Turn on топливопроводы.
10. Disconnect a driving cable (30) from the control lever (5). For this purpose compress a plastic clip (28).
11. Disconnect branch pipes of a heater and vacuum tubes in an impellent compartment. On models from AT: disconnect a vacuum tube from the 2-channel valve.
12. Uncover (3), open the cable pipeline (1) and disconnect it on the right side.
13. Disconnect sockets (X26/17) and (X16/1x1) of conducting of the engine. Press a doggie and turn it under 90 ° to the left to disconnect the socket (X16/1x1).
14. Disconnect the socket from the sensor of provision of a cranked shaft (L5), from the control unit (In), sensors of a detonation (А16) and disconnect vacuum tubes.
15. Disconnect soaking-up tube of system of catching паров gasoline from an adapter in a wheel arch of the left wheel.
16. Disconnect the diagnostic socket (Х11), disconnect the conducting socket from the VMT sensor from the back diagnostic socket.
17. Unscrew a wire (Х27) from a starter and a wire of a chain 30 (X4/10) in front on the right in the lower part of a partition of an impellent compartment.
18. Disconnect the driveshaft, having unscrewed fastening bolts.
19. Weaken bolts of fastening of a support of the intermediate bearing of the driveshaft, but do not remove it.
20. Weaken a driveshaft nut. Move back the driveshaft as far as it is possible.
21. On models from AT выпрессуйте lock levers also disconnect drafts of gear shifting from the gear shifting lever. Disconnect the hydraulic pipeline (shooter) of the working cylinder of coupling from an adapter.
22. On models from AT weaken fixing collars (23) and unscrew a cable (6) from the valve of inclusion of lowering transfer (61) or remove it.
23. Unscrew a connection wire on "weight" from transmission.
24. Remove the socket from the switch of blocking of a starter (8). The socket of the switch of blocking of a starter is fixed by a white plastic ring (shooter). Before socket removal the blocking ring should be lifted and turned up in the arrow direction. Disconnect draft (9) from the lever to the gear shifting selector.
25. By means of two screw-drivers выпрессуйте an adapter (8) from a cable.
26. Disconnect the conducting socket from the valve of protection of transmission from an overload.
27. Attach the lift to engine eyes. Adjust engine lifting so that the engine could be crushed horizontally. Lift the engine by means of a jack.
28. Unscrew a back arm of fastening of the engine without support. Unscrew bolts (1).
29. Unscrew bolts (2) arms (3) transmissions.
30. Unscrew bolts of an of fastening of the left and right support of the engine.
31. Lift the engine with a transmission and take them from an impellent compartment.
32. In case of need remove a back support.


Installation is made as it should be, the return to removal. Adjust AT cables, oil level in the engine and a transmission.