Mercedes SLK R172 Windscreen &ndash; number one rated by Windscreen Review Mercedes SLK R172 windscreen  number one rated by Windscreen Review No wind, no noise, no glare. Drive top-down without getting beat-up and wind tossed. Take long trips comfortably. Can talk on your bluetooth or to the passenger next to you without straining in your Mercedes SLK R172. Lifetime warranty plus 30 day trial period  product fully backed up. Scratch resistance; looks like new with a decade of use. Wives are the number one fans of Windblox windscreens; no more tangled hair when driving top-down