There is only a 3% margin on M-B's since Montvale changed the whole system in 2000. Prices on NEW cars are firm. That is ok since we cannot mark up prices on rare cars like AMG's.
Most dealing is done on your trade and some discounts can be had twards the end of the month when sales have been lean.
I watched a new SL55 sell for sticker price and not a penny more
last month. The new owner could turn around and sell it for
30k more than he paid if he desired.