$300 a tire seems really steep. I got some General Alitmax tires in 195/70/14 size from Tire Rack a few years ago for well under $100 each. They are also modern tires that can handle higher speeds.
Oo there is quite a lot wrong with that. Both the Michelin XWX and Pirelli CN36 are better tyres, built to the highest possible standards by 2 of the worlds best tyre manufacturers.
They are higher specification if you look on these 2 web pages
and scroll down, it gives you the detail about the tyre. Both these tyres have a load rating of 89 (580kg) and a W speed rating (270kph nearly 170mph). which is why Mercedes fitted them in the first place.
Modern tyres absolutely do not handle better than these classic tyres on a classic car. Car design has moved along way since the '70s. and modern tyres have been developed to suit the new chassis design. your car does not have heaps of caster and adverss cambe. you haven't got self leveling suspension, etc. The high speed handling of a modern tyre on these older cars with their relatively soft suspension, will not be as good. totally the opposite.
Horses for courses.
I can justify the price of these tyres, because they are such high quality and specification. The real pricing problem is that they have to be made in such relatively small volumes. Also the difficulty is people associate the price of a tyre to the value of a car which actually has nothing to do with it. It is what your car is that determines what tyre you should buy. I do understand. i have V12 Jag that i paid £ 2,500 for and the tyres were over £ 1,000 for a set.
It is only really fair to compare their pricing to a modern top end Merc (something like an E350) tyre made by Michelin or Pirelli, and then expect it to be more expensive than that because of the costs of small batch production and distribution.
What we cannot get away from, regardless of how fair the pricing is, that it is a lot of money. it has a big effect on that months credit card bill etc. one of the services offered at Longstone is a shoulder to cry on.
currently the Michelin XWX is £ 229 + VAT inside the EU
Pirelli CN36 £ 199 + VAT but there is a big deal of £ 869 + VAT on a set of 5 tyres or £ 699+ VAT on 4.
generally speaking there is free carriage to most places and of course if you are outside the EU there is no VAT