I forgot, the defintion said that laugh track = sitcom. I'm pretty sure Kaisermühleblues does indeed not have a laugh track. I'm pretty bad at remembering what shows have laugh tracks. I think Hausmeister Krause might have one though. Don't remember about Echter Wiener.
novembermond, you do realize that on the Cosby Show both lead characters were doctors and all their children went to university? There were a bunch of comedy shows about black lower class in the 70s, but the Cosby Show wasn't one of them.
I also don't think that a journalist (Kolchak) is necessarily more working class than a cop.
Heroes has never felt like a lower class show to me because in my eyes two few characters are lower class. The most important characters are all rich and educated (Mohinder - scientist, rich family, Peter - rich family, Nathan - politician and rich family, Matt - cop, Hiro - rich family, Claire - father is some sort of super government agent so I would put her at upper middle class).
Are there even any poor characters other than Nikki's and by extension DL's family?