I would have thought that the weight might be the least of your worries. Unless it's a very small wall, I'd be surprised if it's not the volume that is a problem. Half a cubic metres of sand weighs about 800Kg.
Not at home so don't have driver's handbook , but according to below , payload is 480kg. So you'll need to be careful, or make two trips?
May be in with a chance, by that time in the week fuel will be running down to about 1/4 tank and car will be empty. Seems a low payload when most pick ups carry about a ton, Ok different vehicle but looking as how there built a l322 is more substantial than a l200 or navara (not heard of any Rangies snapping in two) would have thought at least half a ton minimum.
It will not snap in two, but you might blow an airspring.
