They seem to be really odd about car grades lately.
I am now on a trip for which I rented class D and I am in a Mercedes Benz C class with GPS, camera for reversing, front and rear parking sensors, voice recognition and heaven knows what else; and it had 7 km on the clock when i drove it out.
Two weeks ago my class D was a clapped out decrepit Mazda 3 with 45,000 on the clock and no features at all. Manual windows, no cruise control, etc.
Go figure. I am really, really happy today, though.