IIRC the germans stay germans in that episode and black-haired german has an exaggerated East Berlin accent. Football team stays a football team, they did not really change the more hard to get cultural references/differences. The only big change i can think of right now is that Uter got turned swiss. I read that the french version was far more liberal with changing jokes and pop culture references in their version of The Simpsons.
The german version had some translation blunders from time to time, like when Marge reads out "Searing Gas Pain Land" in "Itchy&Scratchyland" they translated it as the gas you put in a car. Or in one of the newer episodes, the one with the Jared Fogel cameo, Jared says he's Jared from the literal subway commercial instead of the Subway's franchise, probably stemming from the fact that Subway's was and is not widely available in Germoney.
Oh, and Willy sounds pretty much like a normal person, i guess the german dubbers didn't get that he has a scottish accent. He speaks with a sardinian accent in the italian dub, which i think is a nice and fitting touch.
Not a single second is wasted, it's utterly perfect.
That's what made Golden Age Simpsons so great, virtually every episode was like that, just no wasted time. The only show that had that same high level of constant funny was, unsurprisingly, Futurama in its first seasons.
Edit: Oh wait, i remembered one big pop culture change they made: In "Two Dozen and One Greyhounds" they changed "Rory Calhoun" to "Boris Becker", no one in Germany would know who Calhoun is. There's another translation error or more like an untranslateable line in the episode where Bart says "But he never wants to play anymore since his bitch moved in" the "bitch" got translated into something like "floozy".
There probably are a lot more changes than i initially assumed and now forgot, so disregard what i wrote earlier.
