S4 Quattro Cabriolet V8-4.2L (BHF) (2008)
Battery: Description and Operation
Battery Electrolyte Level, Checking
Lead-Acid Battery without Visual Indicator
Lead acid batteries with removable battery cell sealing caps, without charge indicator "Magic Eye" and filled with fluid electrolyte (wet battery)
require regular maintenance. The removable sealing caps allow for topping off with distilled water.
CAUTION!
Risk of injury from direct exposure to battery acid!
‹› Prior to handling or servicing batteries, read, understand and observe the Warnings and Safety Measures => [ There is a risk of
injury from the battery
acid. ] See: Battery.
Risk of explosion due to the explosive gas that forms during battery charging.
‹› Observe warning notes and safety precautions => [ Risk of explosion due to the explosive gas
that forms during battery charging. ] See: Battery.
Battery Electrolyte Level, Checking
Special tools, testers and auxiliary items required
‹› Battery filler (VAS 5045)
Procedure
Maintaining the correct electrolyte level in the battery is an important factor affecting the length of the battery's service life.
CAUTION!
Risk of injury from direct exposure to battery acid.
‹› Follow accident prevention regulations when working with battery acid => [ There is a risk of injury from the battery
acid. ] See: Battery.
‹› Wear protective eyewear and clothing => [ Protect against injury by using protective
eyewear and clothing. ] See: Battery.
Risk of explosion due to open flame, fire and smoking.
‹› Only illuminate the inside of the battery housing with a flashlight.
‹› Never illuminate the inside of the battery housing with an open flame.
‹› Never handle open flame or burning cigarettes near batteries.
-
If the "min" and "max" marking on the outside of the battery can be seen, simply inspect by sight.
‹› The electrolyte level must be above the "min" marking but must only go as high as the "max" marking.
-
If it is difficult to see the "min" and "max " markings on the outside of the battery or they cannot be seen because the battery housing is opaque,
remove the sealing plugs.
-
Check electrolyte level by visually checking the inside of the battery.
‹› The electrolyte level must coincide with the internal level mark (plastic web). This corresponds to the outer "max" marking.
CAUTION!
Risk of corrosion due to leaking battery acid.
‹› To ensure the various battery connection systems are free of leaks, the battery's original sealing plugs must be installed in the battery
openings. Only replace missing or damaged sealing plugs with the same type of original plugs.