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
   + Systems of ignition and engine management - the general information
   - Systems of a charge and start
      The rechargeable battery - the main data, shutdown and acquisition of the new battery
      Check and charging of the rechargeable battery
      Storage of the rechargeable battery
      System of charging - general information and security measures
      Check of system of charging
      Details of installation of the generator
      System of start of the engine - the general information and precautionary measures
      Check of system of start of the engine
+ Gear shifting box
+ Automatic transmission
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment






Storage of the rechargeable battery

If the car was not used more than two months, the rechargeable battery needs to be removed and charged. Optimum temperature of storage of the battery makes from 0 to +27 °C. At these temperatures a battery self-discharge minimum. It is necessary to charge the battery at least once in two months, otherwise it becomes useless.

The battery which was not used a long time (for example, the car was not operated), is discharged and, besides, can sulfatirovatsya. If such battery is charged with the device for a bystry charge, it does not perceive charging current or owing to sulphation becomes too quickly "completely" loaded. Actually the battery is damaged.

Before defining the battery as damaged it is necessary to check the following:

  • Electrolyte density. If the difference between density in separate sections does not exceed 0.04 g/ml, then it is necessary to charge the battery with the normal charger;
  • After a charge check the battery under loading. If characteristics of the battery below given in Specifications the battery it is damaged;
  • If electrolyte density in one or in two next sections considerably differs (for example, in five sections of 1.16 g/ml, and in the sixth 1.08 g/ml) the battery has short circuit and it needs to be replaced.