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 Diagnostics of malfunctions of the rechargeable battery


Too low level of electrolyte
Recharge. Evaporation (especially in the summer) Add the distilled water to the ordered level (for the charged rechargeable battery).
Electrolyte acts from a ventilating cover
Too high charge voltage Check tension regulator, if necessary replace it.
Too high level of electrolyte Suck away excess amount of electrolyte densimetry with a pipette.
Too low density of electrolyte
Electrolyte density in one cell it is accurate below, than in other cells Short circuit in a cell. Replace or restore the rechargeable battery.
Electrolyte density in two next cells it is obvious below, than in other cells The partition is untight, there is a carrying-out connection between cells owing to what cells are discharged. Restore the rechargeable battery.
The rechargeable battery is discharged Charge the rechargeable battery.
The generator is faulty Check the generator, if necessary repair or replace.
Short circuit in electric network Check electric system.
Electrolyte is diluted with water owing to a mistake at maintenance of the accumulator Modify composition of electrolyte.
Too high density of electrolyte
Electrolyte was added Modify composition of electrolyte.
Too low set power, falls tension
The rechargeable battery is discharged Recharge the rechargeable battery.
Too low voltage of charging Check tension regulator, if necessary replace it.
Connecting plugs are weakened or oxidized Clear connecting plugs and slightly grease, especially lower party, with acidproof protective lubricant, tighten fastening screws.
Bad connections on the case of the rechargeable battery – the body engine Check connections (plug) for the case, if necessary restore metal connections or hardly delay screw connections.
Too big self-discharge of the rechargeable battery because of electrolyte pollution Replace the rechargeable battery.
Perhaps, prosulfatirovana of a plate of the rechargeable battery (a gray-white raid on positive and negative plates) Charge the rechargeable battery with small current slowly to remove a raid. If after repeated charging and a discharge the set power remains too low, replace the battery.
The battery plate is worn-out, the active mass of plates fell off Replace the rechargeable battery.
Insufficient charge at the rechargeable battery
Malfunction in the generator, the regulator of a tension or linear connections Check the generator and the regulator of a tension, repair or replace; fix normally wires.
The belt is weakened maple Tighten or replace maple a belt.
Too many consumers of current are connected Install more powerful rechargeable battery; perhaps, use also more powerful generator.