Hertha have failed to win in their last six games and they have fallen out of contention for a place in Europe next season as a result.
However, Luhukay is still looking to end the season well, starting with a win over the side with the leakiest defence in the division.
"We have the quality in the team, we've just got to stand up and be counted," Luhukay said.
"We're entering into a new phase now and I hope the team rediscovers what it feels like to win.
"It's not like they can have forgotten it, they just have to have the belief and courage to find it again."
Courage has certainly not been lacking for Hoffenheim, who have scored 63 goals this season, bettered only by Bayern Munich.
"And we could have scored 20 more, given all the chances we've had," said coach Markus Gisdol.
However, Hoffenheim also have the worst defence with 62 goals conceded, although Gisdol is not going to change his playing style.
"The way we play is always going to be more risky than the way other teams play," he added.
"We're simply not a team who can take pleasure in getting a narrow 1-0 win."
Hoffenheim are without the injured David Abraham and Sven Schipplock, but, with Koen Casteels fit again, Gisdol must decide whether or not he returns after Jens Grahl deputised in the 3-3 draw with Bayern Munich last weekend.