Everybody who sells anything will haggle - discuss prices. I could give a shit if I am buying a Honda or Porsche, it is a big investment and some dealerships state up front their price is their price. I respect those who put their best price on and won't haggle, but if they are higher there always others who will. Many reps will, some won't, but I am not a huge Mercedes fan. I know a lot of friends with BMW's who love them, decided to try Mercedes and they were no more luxurious/slower/more maintenance/and it had to be done at the dealership and if you didn't it voided the warranty. They were not a better vehicle and yes it was sedan to a sedan and a SUV to SUV.
I, like you, am looking at at high performance cars and there seems to be this concept that if you can afford an expensive performance/luxury vehicle - then it is embarrassing to haggle or discuss price and just pay what they ask. The guys who work their have a name for people who do not offer less - the 'lay down people'. I have friends who sell Cadillac's and BMW's and they get a clientele who have more money, but many people with more money have it because they are frugal and refused to pay more. There is a thought process that if you can buy a Mercedes, you don't have to discuss prices - again I think that is ridiculous. If you ask and they say no - walk away and check another dealership, chances are the salesperson will call you back after they got your info - they all get paid on commission or salary/commission.
Ever wonder why a vehicle that costs twice as much doesn't have a better warranty? If it doesn't - I ask.
It is not the most luxurious, but mods are not expensive and it turned the car into a legit super car. A stock KIA Stinger GT (no longer made) which I own is 0-60 4.4 seconds, an adjustable suspension, Brembo breakes, differential, top speed of 170 mpg, with great Michelin tires which are almost impossible to spin even in sport mode which sends 80% to the rear. Spend $2-5,000 and your car will easily go past 180 mph, 0-30 in just over 3 seconds and already had Brembo breaks, soft tires, and a sport tuned suspension made by Audi and a BMW engineer. Why they stopped making that car I will never know. I still have mine and love it. It smokes a Ford Mustang GT in the 0-60 and 1/4 mile. Getting off base, but my point is there are a lot of great sports / luxury cars that are no luxury brands and if you are willing to mod them - many can compete with the much higher price / maintenance happy 'luxury' brands.
For every Mercedes hater - you will also find one that loves them or they wouldn't be in business.
I agree the
@The Old Guy but I doubt you can buy a new one and have any work done (unless non warranty) and then send it for approval, unless the dealership gets to tell you to touch your toes. They know they will make an incredible amount in the service as the whole vehicle cost. In the closest area that sells Mercedes it is 160 per hour for service. The best mechanics/friends of mine here - two I trust who have been doing it since 16 and are licensed change 80 and can work on any vehicle. They have two large service shops with 8-10 bays and have some of the best mechanics around. Ask if you have to get your service done at Mercedes or can you send in receipts from the mechanic who did it.
Sorry for getting off topic. I hope you enjoy whatever you buy.