Jump-starting a dead car battery: When jump-starting, the correct sequence is important. If the engine of the broken car doesn't start immediately, try again after a few seconds.
If you don't have a jump starter at hand, you can alternatively try to tap into power from another vehicle using a jumper cable. You are on the safe side if it has the DIN standard 72.553 or the ISO standard 6722. You can find even more exciting car topics in the free newsletter from our partner 24auto.de.