Switch off the ignition in both vehicles.
If necessary, open the battery cover in the engine compartment Vehicle battery.
Attach one end of the red jumper cable to the positive terminal ⊕ of the dead battery: Battery ① .
Attach the other end of the red jumper cable to the positive terminal ⊕ of the good battery (booster battery): Battery ②.
Attach one end of the black jumper cable to the negative terminal ㊀ of the booster battery: Battery ② .
Attach the other end of the black jumper cable Ⓧ to a bare metal part of the vehicle with the dead battery. This part should be connected directly to the engine block. You may also attach the cable to the engine block itself. Attach the clamp to a point that is as far away as possible from the dead battery ① .
Route the jumper cables so that they cannot get caught in any moving parts in the engine compartment of either vehicle.
Starting the engine
Volkswagen Tiguan Service and Repair Manual > Refrigerant Circuit, Flushing (Cleaning) with Refrigerant R134a: Flushing Circuit Block Diagrams
Note
The arrows in the following illustrations show the direction of
refrigerant flow while flushing. During flushing, refrigerant flows in the
opposite direction than during A/C system operation, therefore the high
pressure side of A/C service station is connected to A/C compressor at low
...