Volkswagen Golf GTI 2016 Owner's Manual page 1312

Disconnect the red (+) cable from the vehicle with the dead battery.
Close the battery cover.
If necessary, unscrew the towing eye on the front of the vehicle
Installing the front towing eye Towing Front towing eye .
WARNING
Improper use of jumper cables when jump-starting a vehicle with
a dead battery can cause the battery to explode, leading to
serious personal injury. To help reduce the risk of battery
explosion:
All work on the batteries or the electrical system in your
vehicle can cause serious acid burns, fires, or electrical
shocks. Always read and heed the following WARNINGS and
safety precautions before working on the batteries or the
electrical system → Vehicle battery .
Always wear proper eye protection. Never lean over the
vehicle battery.
Attach the jumper cables in the correct order: first the positive
cable, then the negative cable.
Never connect the negative cable from the vehicle providing
starting assistance to parts of the fuel system or to the brake