I've run 55/100 watt bulbs on 2 different Benzes with Euro lights for a total of 4 years now. Also 100watt fog lamp bulbs. No problems with either. The relays, fusing and wiring are up to it. I also ran 80/100s for about a year but switched to 55/100 because they are far cheaper and more readily available. I also have daytime running lights so my bulbs are always on. The difference between stock 55/65 and 55/100 is like night and day. Literally. They take the fatigue factor out of night driving.