Jump-starting, tow-starting and towing away 331 X To fill with compressed air: remove cap on inflator connection : . cross section of approximately 35– 50 mm 2 and insulated terminal clamps. X Refill at filler connection : . When doing so, the filling pressure must correspond to the pressure of brake circuit 1 or brake cir- cuit 2, see the compressed-air system operating data ( Y page 357). R if the outside temperature drops below Т 10 †, a discharged battery could freeze. Do not start the engine under these cir- cumstances. Let the battery thaw out first. ! When you remove the jump leads, let the engine of the vehicle being jump-started idle.
This avoids damage being caused to the vehicle electronics. Jump-starting, tow-starting and tow- ing away Jump-starting ! Do not connect the negative terminal clamp of the jump lead to the chassis frame. Otherwise, engine or transmission components can be damaged. Important safety notes G WARNING During charging and jump-starting, explosive gases can escape from the battery. There is a risk of an explosion. Particularly avoid fire, naked flames, creating sparks and smoking. Ensure there is sufficient ventilation while charging and jump-starting. Do not lean over a battery. H Environmental note Breakdown assistance Batteries contain pollutants.
It is against the law to dis- pose of them along with household waste. They must be collected separately and recycled in an environmen- tally responsible manner. G WARNING A discharged battery can freeze at tempera- tures below freezing point. When jump-start- ing the vehicle or charging the battery, gases can escape from the battery. There is a risk of an explosion. Allow the frozen battery to thaw out before charging it or jump-starting. Dispose of batteries appro- priately. Hand over dis- charged batteries to a quali- fied specialist workshop. Transport and store full bat- teries in an upright position. When transporting batteries, secure them so that they do not tip over.
Note that bat- tery acid could escape into the environment through the ventilation openings in the stoppers. ! Observe the following notes. You could otherwise damage the battery or electronic components in the vehicle: R do not use a battery quick-charge unit for jump-starting. R if you use a mobile battery charger (bat- tery device with mains power stage), remove the mains plug before jump- starting. General notes Observe the safety notes and protective measures when handling the battery ( Y page 306). After jump-starting, have the batteries checked at a qualified specialist workshop. R only have jump-starting provided by vehi- cles with a 24 V system.
R use jump leads which are protected against polarity reversal and with a wire Z