One of the worst things about owning a Mercedes SLK is that if you don't have a convertible you're forced to stare at the car's ceiling after sucking back a line of coke from the dash. Mercedes now appears to have a solution. According to these spy photos from World Car Fans, Mercedes is testing out a glass roof for their SLK. The world just got a little sweeter for the club-going, date-raping fellas that make up America's proud real estate investment banking industry. [World Car Fans]