Bielefeld call in fireman for help
The 64-year-old Berger, who has built a reputation of saving lowly clubs earning himself the nicknames 'fireman' and 'the great motivator', said he would take over for the one match against Hanover 96 on Saturday and would not discuss a longer deal yet.
"The most important thing is the match against Hanover. I will not talk about anything else," the former Eintracht Frankfurt and Schalke 04 coach said on the club's website.
Bielefeld fired coach Michael Frontzeck on Sunday after the team lost 6-0 to Borussia Dortmund and dropped to third from bottom on 27 points, ahead of Energie Cottbus on goal difference. Karlsruhe are bottom on 26 points.
The bottom two teams are automatically relegated and the third team play a relegation playoff against the third-placed finisher in the second division.