At the end of my epic 250 mile journey from picking up my Zed, ten miles from home, I thought i would take my satnav off as it was really bright and getting dark outside. After i did this i pulled away and started driving, The car wouldent go above 40mph no matter what i did, i thought it went in to "limp home mode" so i pulled over and called my support car (My lift up to the zed) and lucky enough he was just behind me. I went off in the megane while he drove the Zed. When he arived at the house just after us he explained it wont go above 40mph IN SNOW MODE Turns out i knocked it with my elbow when i pulled out the satnav. I feel such a fool! He drove it back in power mode and said it was quite rapid Lesson learned i think