I have used Pirelli PZero Nero tires in the past on my Acura RSX, 2 sets were used on that car and each time the tires met my expectations. I recently bought a 2012 CLS550 4Matic and these tires were stock. I was very excited these tires came already on the car and was hoping I wouldn't get the Continentals. These tires grip, they're not noisy and they last a decent time. I have yet to use this car in the snow but in the past with my Acura RSX, the tires were okay in that type of weather. This is also because I bought the PZero Nero Max Performance Tires, but I'm sure the all season ones do and perform exactly as they should all seasons. Not exactly sure which ones are on my CLS550 but I'm not going to drive it in the snow or rain anyway. I just know these tires are great in the dry. My sister had to get new tires on her 2007 Lexus IS250 so I talked her into getting these instead of the Bridgestones that came with it, she's very happy with the Pirellis. They are a great tire from a great company and are very reliable. I don't think I'll ever consider getting anything else or think about replacing these. I've always been happy with Pirelli and have not let me down.