Hi Craig,
I think it’s always worth asking, I think in person would be best unless it’s a long way to go. I’ve ordered a B Class Mercedes and got a flat no from 2 dealers and £1000 off the AP from another which is 160 miles away but well worth the drive as initially everything was done by email so it only means one visit. You’ve nothing to lose by asking and don’t give up with the first dealer you speak to.