Mercedes S-Class W-220

since 1998 of release

Repair and car operation



W220 Mercedes
+ Mercedes-Benz Cars of a class S (W220)
+ Operation manual
+ Routine maintenance
+ Engine
+ cooling and heating Systems
- Power supply system and release
   - Power supply system and fuel injection
      Sbrasyvaniye of pressure in fuel system of the petrol engine
      Management of capacity distribution - the description and a principle of the organization of function of shutdown of cylinders
      Supercharger of air
      Check and adjustment of number of turns of the single course/the moment of ignition/concentration WITH
   + System of injection of fuel of the diesel engine. Turbokompressor
   + Systems of release and decrease in toxicity of the fulfilled gases
+ engine Electric equipment
+ Automatic transmission
+ Power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ electric equipment Cхемы











Power supply system and fuel injection

General information and security measures

Fuel tank

45 — the Jellied mouth
55/3 — the Regulator of pressure of fuel (5.3 atm.)
55/3a — Zaslonka (50 liters at an o'clock)
55/4 — the Intaking chamber
75 — the Fuel tank
B4 — the Fuel level sensor
M3/1 — the Pump which has been built in a fuel tank

A — the Socket of electroconducting of the pump which has been built in a fuel tank
B — the Socket of electroconducting of the fuel level sensor
A — fuel Return from a pressure regulator (5.0 atm.) in the razbryzgivaniye chamber
B — the Line of filling of the intaking chamber from the pump which has been built in a fuel tank
C — the Line of ventilation of a fuel tank
D — To the fuel pump


Function chart of system of microprocessor management of ME SFI 2.0. V6 and V8 engines

It is shown on an engine 113 example
21 — the Final zaslonka 1
22 — the Vacuum tank 1
22/1 — Diafragmenny the switch of the inlet pipeline
55/1 — the Fuel filter with the built-in regulator of pressure
75 — the Fuel tank
76 — the Ventilating valve
77 — the Coal adsorber
89 — the EGR Valve
126 — the Valve of shutdown of a podmeshivaniye of secondary air (the valve of chambers of combustion: the built-in transient valve)
128 — the Transient vacuum valve
157 — the Three-functional catalytic converter at a partition of an impellent compartment
158 — the Three-functional catalytic converter under the bottom
and — Other consumers
А1 — the Control panel
А1е58 — the Control lamp of problem diagnostics of the engine
А16g1 — the Sensor of a detonation 1 (the right side of the engine)
А16g2 — the Sensor of a detonation 2 (the left side of the engine)
B2/5 — the Film sensor of measurement of weight of air (MAF) (the built-in sensor of temperature of soaked-up air [IAT])
B6/1 — the Sensor of effect of the Hall of a camshaft
B11/4 — the Sensor of temperature of cooling liquid (CTS)
В28 — the Sensor of pressure 1
В37 — the Sensor of provision of a pedal
В40 — the Sensor of level/temperature/quality of oil
B40/2 — the Sensor of pressure of oil of system of shutdown of cylinders 1
G3/3 — the Left (verkhnepotochny) oxygen sensor
G3/4 — the Right (verkhnepotochny) oxygen sensor
G3/5 — the Left (nizhnepotochny) oxygen sensor
G3/6 — the Right (nizhnepotochny) oxygen sensor
K40/5kt — the Relay of the fuel pump
K40/7kl — the starter Relay
K40/7kn — the Relay of system of a podmeshivaniye of secondary air
L5 — the Sensor of provision of a cranked shaft (CKP)
L6/1 — the Left forward wheel sensor
L6/3 — the Left back wheel sensor
М1 — the starter Plug 50
M3 — Fuel the pump
M16/6 — the butterfly valve Activator
М33 — the Electric air pump

N3/10 — ECM (ME-SFI)
N15/3 — the Module of management of electronic antiprobuksovochny system (ETC)
N19 — the Module of management of the press button of system an upravlenliya additional air (AAS)
N22 — the Module of management of the press button of system an upravlenliya additional air (AAS)
N47-1 — the Module of management of the monitoring system of draft (ASR) / system of hydrostrengthening of a wheel (SPS) sensitive to speed
N54-1 — the Module of management of IR DAS
S16/10 — the Switch of definition of provision of transmission
S40/4 — Variatorny the switch темпостата
T1/1 —
T1/8 — Coils of ignition of cylinders 1-8 (dual coils)
X11/22 — the Diagnostic DLC II socket
Y22/6 — the Valve switch of the inlet pipeline of variable length of a path
Y31/1 — the Vacuum transdyuser of EGR
Y32 — the Valve switch of the air pump of system of a podmeshivaniye of secondary air (AIR)
Y58/1 — the Valve of management of an adsorber purge
Y62 — Injectors of injection of fuel
Y80 — the Valve of system of shutdown of cylinders of the right row 1
Y81 — the Valve of system of shutdown of cylinders of the left row 1
Y93 — the Final zaslonka 1
CAN Tyre of data
1 Only the engine 113.960 with system of shutdown of cylinders (code 479)


Arrangement of some electric elements

1 — the Relay of electronic control systems of the engine and a running gear
2 — ЕСМ (ME-SFI)
3 — the Relay of the fuel pump

4 — the Sensor of degree of pressing of a pedal
5 — the Relay of the air pump
6 — the starter Relay


Air streams of the inlet pipeline with changeable geometry

And — the Air stream at an open operating zaslonka on engine turns over 3900 in mines
22 — the Operating zaslonka (on one on each cylinder)

In — the Air stream at the closed zaslonka, at low loadings in a range of turns 1750-3900 in mines
With — To the engine


Management of a gazoraspredeleniye. V6 and V8 engines

12 — the Inlet pipeline
17 — the Fuel distributive highway
19 — the Final collector with isolation by an air gap

22 — the Resonant zaslonka
R4 — Spark plugs (2 on the cylinder)
Y62 — the Injector


Elements of the inlet pipeline with changeable geometry

12а — the Top part of the pipeline
12b — the Lower part of the pipeline
12с — the Top part of an insert of the pipeline
12d — the Lower part of an insert of the pipeline
22 — the Operating zaslonka
22/1 — Diafragmenny switching knot тубопровода

22/2 — zaslonka Axes
22/3 — Connecting drafts
and — the Tube to diafragmenny knot
b — the Tube to the valve of switching of the pipeline
M16/6 — a butterfly valve Drive
Y22/6 — the Inlet pipeline


Assembly of the fuel pump (under the bottom, at the left behind)

Fuel injectors (lateral faces of the engine)

The pressure sensor in a fuel tank (a forward central part of a luggage carrier)

Sensor of a stock of fuel (forward central part of a luggage carrier)

Thermometric measuring instrument of weight of vsasyayemy air (the central back part of the engine)

Sensor of a pedal of an accelerator

Sensor of position of the crankshaft

The sensor of temperature of cooling liquid (forward, central part of the engine)

Detonation sensors

Right dokataliticheskiya lambda probe

Left dokataliticheskiya lambda probe

Left post-catalytic lambda probe

Right post-catalytic lambda probe

Element of installation of a butterfly valve (the central back part of the engine)

Injector of injection of fuel in the 1st cylinder (the right side of the engine)


Petrol engines

Into structure of fuel system enter: established in a back part of the car (under a pillow of a back seat) a fuel tank with an adsorber on absorbent carbon, топливопроводы, the electric fuel pump, and also the electronic system of consecutive injection operated by the control unit. The function chart of a control system and an arrangement of sensors are presented on accompanying illustrations.

The stock of fuel is shown to the driver on the dashboard. On the petrol engine of pair of gasoline gather in an adsorber and move in chambers of combustion of the engine.

Essential influence on fuel consumption renders style of driving of the car. Councils on decrease in fuel consumption:

  • After engine start at once get under way from a place even if it occurs on a frost.
  • At a car stop for a while more on 40 with, switch off the engine.
  • Move always on the highest transfer.
  • At movement on big distances whenever possible support uniform speed. Avoid movement on high speeds. Operate the car circumspectly. Without need do not brake.
  • Transport the car excessive cargo. If the luggage carrier is not used, remove it from a roof.
  • Check pressure of air in tires. Do not allow excessive pressure decrease.

Diesel engines

Into structure of fuel system enter: established in a back part of the car (under a pillow of a back seat) a fuel tank, the fuel filter, nozzles, fuel tubes and hoses, the sensor of a stock of the fuel, located in a tank and the block of electronic control by the engine.

Fuel moves the special pump via the filter. In the filter dirt and the water containing in fuel settles.

The engine copes the electronic system similar to a control system of petrol engines. The system operates operation of the engine, analyzing information arriving from a large number of sensors.

On diesel models there is no accelerator cable. Instead of it on a pedal the sensor of its situation is established.

The valve of an otsechka of fuel at switching off of ignition is absent. To muffle the engine at ignition switching off, the control unit the engine sends a signal which, in turn, stops supply of fuel to nozzles to the TNVD control unit.

Components of a fuel tank do not act in film. The fuel system is designed so that not to allow «подсоса» some air in the absence of fuel in a tank. The control unit constantly checks fuel level in a tank, processing information arriving from the sensor of a stock of fuel, located in a tank. When falling a stock of fuel to a certain level the control unit lights warning lamp on a control panel then compulsorily causes admissions of supply of fuel, limiting to that the maximum speed. It proceeds until fuel level in a tank will not exceed an admissible mark.

The fuel system of diesel engines is very reliable. During the using of pure fuel and performance of regular service it should function regularly before the termination of service life of the car. After very big run internal components of nozzles can wear out, and they will be necessary for repairing. As the pump - nozzles have a difficult design, repair is recommended to be carried out in a specialized workshop.

The fuel pump takes away fuel (D) of the bottom point of the damper (55/4) serving for prevention of hit in an inlet path of the pump of air during commission of turns with low level of fuel in a tank (75).

Pogruzhna the fuel pump (M3/1) copes the electronic module tracing quality of filling of a damper and provides an expense of 220 l/h at effective a napoyer of 0.3 atm.

In addition fuel pumping in a damper is carried out by the auxiliary soaking-up pump working at the expense of a stream of superfluous fuel, returned in a tank from a pressure regulator (5.0 atm.).

The components placed in a tank (including the fuel pump) are not subject to removal and regenerative repair and in case of their refusal all tank assembled is subject to replacement. The exception makes only the sensor of a stock of fuel (В4).

The throttle (55/3a) reduces fuel consumption in brought to the pump of pumping of the returnable line (And) to 50 l/h at pressure of 5.0 atm. The regulator of pressure prevents increase of a pressure over 5.3 atm.

Security measures and rules of observance of purity at work with fuel system

At work with fuel system it is necessary to observe the following security measures and purity:

The remark on security measures

Do not use near a workplace open fire, do not smoke and do not hold any strongly warmed up subjects. There is a danger of accident! Keep in readiness the fire extinguisher.

Watch normal ventilation of a workplace. Fuel pairs are poisonous.

The fuel system is under pressure. When opening system fuel can escape under pressure. Collect fuel a rag. Use goggles.

At work with components of a power supply system of the diesel engine observe special precautionary measures. In special degree it belongs to nozzles. Keep in mind that pressure of fuel at an exit makes about 1100 atmospheres of nozzles. Do not allow hit of any parts of a body under a fuel stream.

Shlangovye connections fasten by means of tape or tightening collars. It is necessary to replace tightening collars with tape collars or collars of the last design surely. For installation of tape collars there is a special adaptation, for example HAZET 796-5.

Connections and places adjoining to them before opening carefully clear.

The removed details stack on a pure lining and close. Apply for this purpose polyethylene or paper. Do not apply for this purpose a fibrous fabric!

Carefully close open details or put technological caps if repair lasts some time.

Establish into place only pure details. Spare parts take out from packing only directly ahead of installation. Do not apply details which were stored unpacked (for example, stored in a tool box).

At open fuel system whenever possible do not work with the compressed air. Whenever possible do not move thus the car.

Do not apply some hermetics containing silicone. The elements which have got to the engine of silicone in the engine do not burn down and damage the oxygen sensor.

Security measures at removal of a fuel tank:

  • Before removal of a tank merge from it fuel or pump out fuel pump specially provided for this purpose.
  • The fuel tank acts in film from the bottom party of the car. Before a detachment of collars of fastening of a tank bring to it from below a jack and linings.
  • The empty tank is explosive and cannot be utilized in such look. Before utilization the tank should be cut on a part. Watch that thus there was no spark. For this purpose hand over a fuel tank in the specialized enterprise.
  • After tank installation into place start the engine and check tightness of all connections.