Jump starting other vehicles

[Johnmed]

Hi all. Last summer I tried to jump start a lawnmower in France (as you do), with no luck. And today I tried to jump a friend's Qashqai thing. I wasn't expecting it to work, and it didn't! I had to tow her car to start it. She'd not done that before, so it wasn't as easy as you'd expect. But hers being a manual at least that option was available.

It got me thinking about if the D3 could jump start another car. I know the complex power management and the steel bar on the - terminal of the battery complicate things.

So, is it possible?