A majority of those Turks living in Germany that are still interested in Turkish politics seem to be rather fervent AKP supporters, but I think that there is no strong correlation between the opinion on Turkish and on German party politics (except for the radical left, of course.) Many Turkish guest workers and ex-guest workers see the SPD (or the Greens) as their natural political home in Germany, while they would never vote for its Turkish sister party, the CHP.
It is an interesting tendency, that one. The most extreme case here would be all those Irish immigrants who tended to vote Labour here but supported Fianna Fail back home (given the recent collapse in FF's political standing I presume that the latter part of that is no longer true... but we can be fairly sure that they don't back Irish Labour, lol).
FWIW, local emigrants to England of my experience tended to map (FF/I Lab) -> GB Lab, FG -> Con (not that there would ever have been many Irish Labour voters in north Longford/south Cavan). FF tended to be economically more to the left than FG was, so it's not that sizeable a leap.
