It really is down to individual sales people.
I was on my third or 4th BMW and was looking for a new one. I had my eye on downsizing from a F10 5 series 528i down to a 3 series 328i M Sport. However, getting on a bit now

I was a little concerned about the ride quality of the 3 series in M sport guise so enquired with the dealer about the adjustable suspension option as I had the VDC (Variable damper control) on my current car.
Well...... to cut a very long story short they could not get me anything with the adjustable suspension to test drive, apparently nobody specs it

so I ended up walking away in the end and buying an A6.
The previous BMW sales lady at the same dealership went to the trouble of getting me an F10 with the engine I wanted (2.0 twin scroll 245hp model, very rare at the time) to test and I ordered the car. This prat wasn't interested although as a company we had taken 4 or 5 cars from them in as many years.
I found out later that if BMW get a car in from the national fleet they have to pay a few hundred pounds to get a specific car for a few days, which is obviously why the new salesman couldn't or wouldn't get one in with the suspension I wanted to try. So this cost him a £40K sale on my car and anther £25K sales on one I bought for a colleague a month later, for the sake of a couple of hundred pounds.
He only had to look back at their records to see what we had bought previously. The final clincher was when he contacted me a few days later and said " Can you tell me what colour you want so that I can order it before I go on holiday"...... Prat !!
Incidentally although they are nearer I also buy all my "Z" related parts form another BMW dealer too.