Labour rate or labour markup by manufacturer/OEM

Premium brand customers can afford more for their service. Dealers who service multiple makes would benefit having the ability to either choose a different set of rates, or possibly a simple markup matrix on their current labour rates based on the vehicle manufacturer on the work order. If I am servicing a Mercedes vs a VW, I can get away with a higher rate. This would be especially helpful for dealers with multiple brands in the same rooftop (Ford/Lincoln, Nissan/Infiniti stores)