I did it a few month back when I joined this forum and read about the issue. to be honest I regret it. I actually did like Pirelli and they were RFT. Dealer swapped to Verdenstein 20inch all season not RFT. It took 2 weeks to get replacement. So was quick job. I had to contact support for them to even send me a sealant tire kit for free. But they only sent it for 1 tire. Now, I don't really think if it will make any difference in reality, but if I have 2 punctures I am screwed. Luckily of course we all have free recovery by MB, so as long as I have mobile signal I should be fine.