Just picked up a new Q5 that was in Audi stock and came off the boat a few weeks ago. But hill hold assist isn't on there and i thought it came as standard when i looked on configurator running through it with the dealer. Was there a MY18 change that included this as standard ? and maybe mine was built late 2017 so i missed it becoming standard. Can it be retro fitted? Not a massive thing but found it handy sometimes. Any help would be great.