According to the approval certificate, my C220 CDI tyres are of specification 205/55 R16 91V. I am only interested in the speed index. Is it right that the next lower speed index can be chosen for winter tyres? My summer tyres have the speed index “V” (up to 240 km/h). With the winter tyres, which are to be purchased soon, I would like to choose a tyre with the speed index “H” (up to 210 km/h). Is this permissible?. I am only interested in the legal aspect. In the registration certificate of my C220 CDI a maximum speed of 232 km/h is entered.