Mercedes S-Class W-140
1991-1999 of release
Repair and operation of the car
+ Mercedes-Benz cars of the class S (W-140)
+ Operation manual
+ Routine maintenance
+ 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
+ Brake system
+ Suspension bracket and steering
+ Onboard electric equipment
Check and charging of the rechargeable battery
The low-served rechargeable batteryIf the annual run of the car is small, for check of state of charge of the accumulator each three months should be measured electrolyte density. Measure density by the areometer.
If the condition of the battery causes fears, check electrolyte density in each can. The difference more than on 0.040 indicates loss of electrolyte or damage of plates.
Unattended rechargeable batteryIf the tight rechargeable battery is installed on the car, to check density of electrolyte and it is impossible to restore its level. The condition of the battery can be checked by means of the built-in indicator or the external voltmeter.
Some models are equipped with unattended batteries which case the indicator of degree of state of charge is built in. It is located from above and changes the color at change of degree of state of charge of the battery. If the indicator has green color, the battery is completely charged if the indicator red - the battery has to be charged. The sequence of actions when charging battery is given below in this Chapter. Batteries of other producers can have the built-in indicator of degree of state of charge too. In this case follow the instructions provided in the maintenance instruction of the rechargeable battery.
Rechargeable batteries of all typesWhen checking the battery by means of the external voltmeter connect it to plugs and compare the received result to the data provided in Specifications. The result of measurements will be true if the battery was not charged at least within the last 6 hours. If it was loaded - include for 30 seconds of a headlight, then wait 5 minutes and check tension on plugs. All other electric equipment (including even intra saloon lighting) at the same time has to be switched on.
If result of measurements less than 12.0 In, then the battery is discharged, and tension from 12.0 to 12.4 signals about a partial razryazhennost.
If the battery needs to be charged, remove it from the car (see the Section Check and adjustment of a corner of an advancing of ignition) and load, following the procedure described below.
Check of fastening of plugs of the rechargeable battery and holder
Move plugs of the rechargeable battery in different directions and check reliability of their fastening, if necessary tighten.
Check of the rechargeable battery under loading
The ordinary and low-served rechargeable batteryIt is necessary to charge the battery with the current equal to 10% of capacity (for example if the capacity of the battery makes 45 Ach, it is necessary to load it with current 4.5 A) until within 4 hours electrolyte density in banks does not increase.
On the other hand, the automatic charger with current about 1.5 And can be left included on all night long.
Chargers of the "accelerated" type which, allegedly, can charge completely the accumulator in a couple of hours are not recommended to be used as at big currents of a plate of the battery can overheat and collapse.
When charging battery you watch that temperature of electrolyte did not exceed 37.8 °C.
Charging of the unattended batteryThe full charge of the battery of this type will require bigger time, than for charging low-served or usual. Duration of charging depends on degree of a razryazhennost and can take up to three days.
Tension developed by the charger has to lie in the range of 13.9 - 14.9 Volts, current should not exceed 25 amperes. Under existing conditions the battery can be used in 3 hours, tension on plugs has to be about 12.5 Volts. Achievement of a full charge will take longer time.
Remarks on security measuresBefore charging of the rechargeable battery study remarks on the security measures given in the Section Check of a Condition of the Battery, care of it and charging).
Charging of strongly discharged and sulfatirovanny rechargeable battery
The rechargeable battery, long time which was not used (for example, at the long parking of the car), is discharged and sulfatirutsya over time.
Strongly discharged battery sulfatirutsya, i.e. on a surface of electrodes large slightly soluble crystals of sulphurous lead are formed. Electrolyte at the same time loses transparency and gets weak white coloring.
Bystry charging / help at startCharge with the device for a bystry charge the battery only for ensuring start of the car. At the same time force of charging current makes 20% and more from battery capacity. At the same time the battery is damaged since is affected by big currents. Time not used and strongly discharged battery is long it is not necessary to load with the device for a bystry charge since it leads to sulphation.