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
+ Cooling systems, heating
- Power supply system and release
   + A power supply system and injection of fuel of the petrol engine - the general information
   + System of injection of fuel of the diesel engine - the general information
   + Control system of injection of fuel and HFM-SFI ignition (6-cylinder petrol engines)
   + Control systems of the LH-SFI and ME-SFI engine (8-cylinder petrol engines)
   + Control systems of injection of fuel and ignition of ME-SFI and LH-SFI (12-cylinder petrol engines)
   + Control system of fuel injection (diesel engines of the OM603.971 series)
   + Control system of fuel injection (diesel engines of the OM606.961 series)
   + System of a turbo-supercharging - the general information
   Systems of decrease in toxicity of release - the general information
   System of production of the fulfilled gases - the general information
   Catalytic converter (petrol models)
+ Engine electric equipment
+ Gear shifting box
+ Automatic transmission
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment






Power supply system and release

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

Fuel grades

Petrol models

Unleaded gasoline is not worse than AI95/A85. Short-term use of unleaded gasoline is allowed not worse AI91/A82.5 (developed by the engine power a little decreases, fuel consumption grows).

Use of additives to fuel is fraught premature to wear and damages of internal components of the engine!

Diesel models

Summer and winter diesel fuel

Do not apply diesel fuels ship, boiler, etc.!

When using diesel fuel with raised (more than 0.5%) the content of sulfur you make replacement of motive oil through each 7500 km of a run from above.

Winter fuel provides normal operability of the engine at temperatures up to -20 °C.

Thanks to preliminary heating of fuel at the included system of heating of salon trouble-free functioning of the engine is guaranteed at temperatures of external air up to -25 °C.

Do not add gasoline to diesel fuel!


In case of use of summer diesel fuel, and also at temperatures of external air below -15 °C it is necessary to add certain, depending on temperature of external air quantity of means for improvement of fluidity or kerosene to fuel.

Composition of mix

Temperature of external air of °C
- 15 to –23
- 23 to-30
Summer diesel fuel
80%
50%
Kerosene
20%
50%
Temperature of external air of °C
- 25 to –30
- 30 to-35
Winter diesel fuel
80%
50%
Kerosene
20%
50%

Means for improvement of fluidity can be used also in combination with kerosene.

The certificate of the allowed means for improvement of fluidity can be received on any HUNDRED Mercedes-Benzs.

The share of content of additive taking into account temperature of external air has to be minimum.

The kerosene share in mix has to make no more than 50%.

Additive has to be added to fuel during gas station before there was its solidification to release of paraffin. Faults owing to release of paraffin can be rectified only by heating of all power supply system.

You carry out mixing of diesel fuel with kerosene only in the fuel tank, - at first in a tank kerosene is filled in, then diesel fuel is added. In conclusion it is necessary to allow to the engine to work for distribution of mix on all path of a power supply system for some time.

Additives of kerosene lead to decrease in a point of ignition of diesel fuel owing to what fire danger of mix increases! Follow the corresponding safety regulations!

Volume of the fuel tank, l

Models without ski cover

Full capacity near
88
Including fuel reserve near
11

Models with a ski cover

Full capacity near
78
Including fuel reserve near
10

System of injection of the petrol engine

System type Electronic microprocessor system of the distributed injection. The inlet pipeline with changeable geometry.

S280 S320 		Bosch HFM
S420, S500, S600 Bosch LH or ME

System of injection of the diesel engine

Type
TNVD Bosch, PES 6M RS 181, No. 0 400 076 956 with the drive doubled by a chain from a crankshaft asterisk
Injection moment
Is established by means of the control probe, the engine has to be in VMT
Regulator
No. 0 400 076 956
Bosch nozzles,
No. 0 432 217 266

Pressure in system, bar

At the exit of the fuel pump (S500, S600)
5.3-5.5
With the disconnected vacuum
3.7-4.2
With the connected vacuum
3.2-3.6

On open nozzles (TDI)

New/former in the use
115-125/100

Resistance of the sensor of temperature of cooling liquid, Ohm (at a temperature)

S280, S320
309-341 (80 °)
S420, S500, S600
325 (80 °)
S300 TDI
Data are not provided

Resistance of the turns/VMT sensor, Ohm

S280, S320
680-1200
Resistance of injectors, Ohm
14-16

Duration of opening of injectors, ms, at rpm

S280, S320
2.5-3.8, at 700

Adjusting data

Check of installation of the moment of the beginning of injection of TNVD

Tags of position of the crankshaft at adjustment of TNVD 24 ° (EGR 19 °) before VMT

Adjustment of turns of idling (TDI model)


Idling turns (are supported automatically)

S280, S320
650-800
S420, S500, S600
675±50
S300 TDI
560-660
Restriction of turns without loading
S300 TDI
4600-4900
Contents WITH on single turns,
at the oil which is warmed up to 60 °C
No more than 0.5%
The maintenance of NANOSECOND on single
turns, ppm (particles)
100
The maintenance of CO2 on single turns
14.5-16%
The maintenance of O2 on single turns
0.1-0.5%
Contents WITH on 2200-2800 rpm
0.3%
Value a lambda on 2200-2800 rpm
0.97-1.03
Adjusting provision of TNVD
(see an illustration)
24 ° before VMT

Efforts of tightening of threaded connections, Nanometer

The moments of an inhaling of fixture are given also in the text of the Head and on some illyustratsiyakh*.

* The moments of an inhaling highlighted in the text in bold type are subject to exact observance; the efforts which are not highlighted in bold type are given only approximately.

Oxygen sensor
50-60
Detonation sensor
20
Bolt of fastening of the CKP sensor
10
Bolt of fastening of the CMP sensor
10
Nipple sockets of fuel lines
10-14