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
+ Systems of cooling, heating
- Power supply system and release
   + the 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 ME-SFI and LH-SFI ignition (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)
   + turbo-supercharging System - 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
+ Avtomaticheckaya 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 Head and in case of obligation of their performance are allocated with a bold print.

Fuel grades

Petrol models

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

Application 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 ship, boiler, etc. diesel fuels!

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

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

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 to - 25°С.

Do not add gasoline to diesel fuel!

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

Mix structure

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

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

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

The share of the maintenance of an additive taking into account temperature of external air should be minimum.

The share of kerosene in a mix should make no more than 50 %.

The additive should be added to fuel during filling before there was its zagusteniye to paraffin allocation. Owing to allocation of paraffin it is possible to eliminate malfunctions only with a way of heating of all power supply system.

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

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

Volume of a fuel tank, l

Models without a ski cover

Full capacity near
Including fuel reserve near

Models with a ski cover

Full capacity near
Including fuel reserve near

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

TNVD Bosch, PES 6M RS 181, No. 0 400 076 956 with a drive doubled by a chain from a crankshaft asterisk
Injection moment
It is established by means of the control probe, the engine should be in VMT
No. 0 400 076 956
Nozzles of Bosch,
No. 0 432 217 266

Pressure in system, a bar

On an exit of the fuel pump (S500, S600)
With the disconnected vacuum
With the connected vacuum

On open nozzles (TDI)

New/former in the use

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

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

Resistance of turns/VMT sensor, Ohm

S280, S320
Resistance of injectors, Ohm

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

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

Adjustment of turns of idling (TDI model)

Idling turns (are supported automatically)

S280, S320
S420, S500, S600
S300 TDI
Restriction of turns without loading
S300 TDI
The contents WITH on single turns,
at oil heated-up to 60°С
No more than 0.5 %
The maintenance of NANOSECOND on the single
turns, ppm (particles)
The maintenance of CO2 on single turns
14.5-16 %
Contents О2 on single turns
0.1-0.5 %
The contents WITH on 2200-2800 rpm
0.3 %
Value a lambda on 2200-2800 rpm
TNVD adjusting situation
(see an illustration)
24 ° before VMT

Efforts of a tightening of carving connections, Nanometer

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

* Allocated in the text a bold print the moments of an inhaling are subject to exact observance; the efforts not allocated with a bold print are given only roughly.

Oxygen sensor
Detonation sensor
Bolt of fastening of the CKP sensor
Bolt of fastening of the CMP sensor
Shtutsernye sockets of fuel lines