Mercedes S-Class W-220

since 1998 release

Repair and operation of the car

Mercedes W220
+ Mercedes-Benz cars of the class S (W220)
+ Operation manual
+ Routine maintenance
+ Engine
+ Cooling system and heating
+ Power supply system and release
+ Engine electric equipment
+ Automatic transmission
+ Power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
- Onboard electric equipment
   Diagnostics of malfunctions of onboard electric equipment - the general information
   Check of the electric motor of a screen wiper
   Check of the warmed back glass
   Replacement of glow lamps
   Function of reserve light
   Electric safety locks
   Installation of electric and electronic devices
   Elements of the uniform lock
   Arrangement of the basic electric elements of system of electric equipment of a body of the car
   Anticreeping alarm system
+ Schemes of electric equipment

Onboard electric equipment

General information

Cars of this brand are equipped with 12 V system of electric equipment with grounding on a negative pole. Power supply of all lighting fixtures and electric units is carried out from the battery of lead-acid type recharged from the generator of alternating current.

This Head is devoted to the description of procedures of service and repair of a component of system of onboard electric equipment which number treat except concrete considered below also all lighting fixtures and electric accessories which are not connected directly with the engine. Besides, procedures of diagnostics of malfunctions of electric equipment of the general order are considered. Information on the battery, the generator and a starter is provided in the Head Elektrooborudovaniye of the engine of the Management.

 Attention! When performing any works on repair and service a component of system of electric equipment it is necessary to disconnect without fail previously a weight cable from the battery in order to avoid receiving an electric trauma and/or ignition.