Is my local BMW shop manager an idiot??

[Budarooski]

I took my '07 X4 4.8i premium/sport in for an a/c repair and while I had it in I told them I don't feel ANY difference when the Sport suspension is activated (green light is on). I read in the manual the suspension should tighten up and the steering should change as well.

His reply? "The button doesn't do anything except on the M model." Seriously, that's what he said. So I said that's weird because the M model X5 wasn't available in '07, and I paid for the SPORT option, so shouldn't it work? Why would they put a button in the car, with a light to signify it's ON if it doesn't do anything?

Anyone have any information or advice on how to respond to the service manager when I call them again? They're going to have my X5 for 4-6 weeks because the A/C compressor comes out of Germany and is on back-order, so that's plenty of time to look/fix the sport suspension.