Mercedes of the S-class W202

1993-2000 of release

Repair and operation of the car

Mercedes W202
+ 1.2. General information
+ 2. Maintenance
+ 3. Engines
+ 4. Lubrication system
+ 5. Cooling system
+ 6. Heating, ventilation
+ 7. System of ignition
+ 8. Fuel system
+ 9. Transmission
+ 10. Running gear
+ 11. Steering
+ 12. Brake system
+ 13. Body
- 14. Electric equipment
   14.1.2. Measuring devices
   14.1.3. Technology of measurements
   14.1.4. Checks of electric equipment
   14.1.5. Sound signal
   14.1.6. Replacements of safety locks
   - 14.1.7. Rechargeable battery Unattended rechargeable batteries Check of the rechargeable battery Self-discharge of the rechargeable battery Charging of the rechargeable battery Storage of the rechargeable battery Diagnostics of malfunctions of the rechargeable battery
   + 14.1.8. Generator
   + 14.1.9. Starter
   14.1.10. Traction relay
   + 14.1.11. System of lighting
   14.1.12. Devices
   14.1.13. Dashboard
   14.1.14. Glow lamps on the dashboard
   14.1.15. Light switch
   14.1.16. Radio receiver
   + 14.1.17. Antenna
   14.1.18. Loudspeakers
   + 14.1.19. Rubber brushes of screen wipers
   14.1.20. Windscreen washer jets
   14.1.21. The washing nozzles of headlights
   14.1.22. Screen wiper and its engine
   14.1.23. Protect the car
   14.1.24. Anticreeping "immunodeficiency"
   14.1.25. Why headlights grow dull
   14.1.26. Galogenka
+ 14.2. Electrical circuitries Storage of the rechargeable battery


Rechargeable batteries which long were not used, discharged independently and, besides, of their plate can be prosulfatirovana. If these batteries are charged by means of the fast-charger, then they do not absorb charging current or because of a so-called superficial charge are too early "completely loaded". They seem faulty. But before considering these rechargeable batteries faulty, they should be checked.

Check electrolyte density. If in all cells density of electrolyte differs among themselves no more than on 0,04 g/ml, then this rechargeable battery can be charged with the standard charger.

If density in one or two next cells deviates more considerably (more than 0,04 g/ml), then the rechargeable battery has internal short circuit and is faulty.

After charging test the rechargeable battery under loading. If it does not reach preset values, then it is faulty.

To prevent aging of the rechargeable battery, it is necessary to recharge the stored battery each three months.