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

Sbrasyvaniye of pressure in fuel system of the petrol engine

Before starting to work, familiarize with the precautionary measures given in the previous Section.

 Attention! After performance described below procedure you only remove superfluous pressure from fuel system. In pipelines there will be a gasoline. Before disconnecting any fuel hose, accept all necessary precautionary measures.


1. The fuel system considered in this Chapter, consists of the fuel tank located in it of the fuel pump with the sensor of a stock of fuel, the fuel filter, injectors, a regulator of pressure and various hoses and tubes. In all these knots in engine operating time (and also at the included ignition) fuel is under pressure.
2. After ignition switching off pressure in system remains still quite long time. Before a detachment of any of mentioned above the component is necessary for reducing pressure.
3. The simplest way of dumping of pressure is following. Take a safety lock of the fuel pump and start the engine. If the engine is not started, turn it a starter within several seconds and if it will be started, allow the engine to work at single turns until he will not decay. Completely to dump pressure, turn the engine crankshaft a starter on pair of turns. Switch off ignition and return into place a pump safety lock.
4. The valve of dumping of the pressure, located works at the fuel distributive highway by a principle of a simple nipple. Place rags round the valve, remove a cap and press on a nipple. After completion of work do not forget to return a cap into place.
5. Keep in mind that if pressure is dumped (or from system is removed fuel), start of the engine will borrow bigger, than usually, time. You should turn the engine crankshaft a starter at least some seconds during which pressure in system will be restored, and fuel will fill all pipelines.