this is the unimogs Achilles heal, due to its high nose weight and low tail weight, the nose weight acts as a cater leaver, infact in truck trials and serious off road competitions, competitors often fill the rear tyres of unimogs with water.
in this situation the gears should have been used in a unimog, rather than the brakes. also, when going into a down hill position such as this, or going downhill at all, its usually best to either accelerate or get ready to accelerate, this is due to the unimogs heavy nose weight means it doesnt like going down steep hills, one of its main disadvantages off road actually. if ever you feel like a unimog is going to go over forwards or at an angle like this one, in most cases you should accelerate out of it.
having said that, the unimog does have a low center of gravity, and are incredibly stable on side slopes.
