Lockable air outlet - 60 mm - Webasto, Autoterm, Eberspacher or Truma

-Look at that the Terminal negative of its battery is connected to Earth.
-Look at that the two batteries have the same voltage nominal, i.e., that both batteries are of 12 or 24 volts.
-Ensure is that those cars are braked with the brake's hand, both are with the box of changes in NEUTRAL and with the boot in position of disconnection.
-Add distilled water to the elements that need it.
-With the clips of boot of the cable RED, connect with firmness the Terminal positive of the battery in good state, to the Terminal positive of the battery discharged.
-With the start of the BLACK wire clamp, firmly connect the negative terminal of the battery in good condition a part of metal unpainted engine that has the dead battery. To the make this connection end, is will produce a spark, therefore, is important do this connection it more far possible of the battery or of any leakage of fuel.
-To start the engine of the vehicle which has the battery.
-Treat of do start the vehicle of the battery discharged. If not start immediately, leave up the engine of the vehicle that has the battery in good state, during some minutes, before treat again of do start the engine. 
-Remove them clips of emergency in order reverse, or, first the clamp of the cable BLACK of the engine, to avoid a spark in the battery.
-The Red boot clamp and cable BLACK boot clamp should never be in contact with each other
-Keep cables and hands away from the fan and belts.
-Recommended to always air free or in a ventilated.