I had to do a search on "DAB Audio" to see what you meant. I also assume Hampshire is in UK, correct? So DAB is Digital Audio Broadcasting which I think is similar to HD Radio in the US.
I also assume it really shouldn't matter as long as the HU (Head Unit) is a standard single Din. Just read through several of the long threads about replacing the radio, and you will get tons of good (sometimes conflicting opinions) advice. The VW/Mercedes wiring adapters work well, just double check the yellow/red wires, some harnesses swap the colors, so match the function, not the color.
Also the Crossfire only has 1 pair of outputs, there is no fader function, so the replacement radio would typically only connect the "front" wires to the factory harness, and you set the balance to the front and ignore it. What model Kenwood is it?