Real question on honoring special requests is how much a customer spends w/Merc on cars annually/over past 2-3 yrs to justify special orders...and what to charge to cover costs of (and profit from) special orders....these are businesses that need to generate reasonable profits for shareholders....
Reality is most wealthy guys around world need/want Mercs/F/P in their fleets no matter how ugly new models may be/how difficult mfrs are re: special requests......