audi rs4 b8 tech help please

[911gary]

Good Morning My RS4 B8 2013 intermittently shows multiple faults happens every few weeks,it has KW coilovers fitted,under deceleration and a bit of steering input it flashes "Steering fault","Sport differential fault" and "adaptive headlight failure" after two or three drive cycles it all goes back to normal all faults appear and disappear together any ideas please?

[LordLoveLength]

I’d be carefully examining wiring harnesses under the front for damage or abrasion.
Who fitted the coil overs? Were any wires re-routed or unclipped?

Does sound a bit like an intermittent short or possibly water ingress somewhere with the water causing a short under certain conditions