Hi Leutz! I drive a Renault Kangoo and a Mercedes C 200 Sport next to an XJ81, which is still “winter-parked” at the moment. Both vehicles have been refueled exclusively with Super E5, but for about two months now hardly pull the sausage off the plate and have detonators (the Kangoo already longer, the MB since this morning –> at 4.5 tsd. revolutions, despite full throttle back to 3.5 tsd. revolutions!!!). The Kangoo was in two workshops (at Renault and in the free workshop of a known In the Mercedes I still wait for today’s return trip from work. Should he still jerk, he goes into the (without soon coming) inspection. Are there any of you forum members with similar experiences lately? I find the whole thing very strange and I think that the fuel doesn’t burn properly. What do you think about it? Best wishes, Nathaniel!