I was initially asking about the 125 shot because somebody posted they had one, but I would only be interested in the 50 shot and limited use. You are correct about the fact that nitrous shocks the system when triggered, but the reason I didn't mention that is because if you know enough about Nitrous systems, which it sounds like you do, you can also install them with linear phase step up solenoids, which, like my initial point would make them just like a turbo or supercharger (gradual increase in compression rise). But again, a 50 shot, occasionally uses, on a 220 hp car would have no increase of wear to the engine. Most engines are built, with a 25 - 30 % robust safety factor, for increased reliability, and I would think MB, has at least that safety margin. On the warranty topic, There is almost no chance of an serious engine failure with a 50 shot, unless something gets overlooked from ignorance, but in the unlikely event that the engine blew up, sure i would remove everything, better than paying over $5,000 in a repair.