It was the time Volvo owned Mack and Renault, they needed a cabover body so they used the Renault Premium DCI body which worked well BUT there is a twist. There were three variants from my understanding and i picked the best of the bunch. YES its australia only models and there are flaws in its implementation that i am addressing such as the cabin is 24v while the engine is 12v so they put voltage converters under the battery box which is behind the engine. I have since replaced the rubbish australian made converters that were giving me 20v for whatever reason with high end chinese ones (i know you may laugh but you can get high end stuff in china and these give a very clean 13.8v) and relocated it under the bed in the cabin where the ECU for the engine sits and there is ample room (thus put my amp, fuse boxes for accessories and added relay for converter which switches on with the 24v ignition switch). The australian converters from a company called "redarc" which were used originally have a really good reputation but the company told me they only keep wiring diagrams for current models (not kidding, my jaw dropped but the staff did give me info which wires did what but sadly that turned out to be wrong !!!), whereas the chinese company provides wiring diagrams for the old models on their website (as they should) and costs 1/12th the price of the australian brand!!! Sadly i would like to use Australian products but 12 times the price while not providing wiring diagrams is a joke and i have worked for chinese companies in electronics and they are awesome with technical diagrams and i am not surprised they are doing so well.
Variants:
1. Early ones had Renault frame (plus axles it seems and tanks etc), but mack e7 engine, this was troublesome as the frame was narrower and was insanely bad to get to the air pump (this is where people say the issues with quantums being hard to work on comes from).
2. Mid version (my model) had Mack CH everything under the cabin so essentially its a CH with e7, eaton Road ranger etc and only difference is you need to lift the cabin to work on it which is no biggie as come with both hand and electric cab lift.
3. Last version same as mid version but with an ISX engine rather then the e7 (i suspect to meet polluton requirements), also one i avoided in the search as i wanted the mighty e7.