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
+ Engine electric equipment
+ Gear shifting box
+ Automatic transmission
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
- Onboard electric equipment
   Specifications
   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
   Electric safety locks
   Installation of electric and electronic devices
   Arrangement of the basic electric elements of system of electric equipment of a body of the car
   + Schematic diagrams of electric equipment






Onboard electric equipment

General information

Cars of the considered brand are equipped with a 12-voltny power supply system 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 some components 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 Heads Routine maintenance and Electric equipment of the engine of the Management.

When performing any works on repair and service of components 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!