Defeat to Wolfsburg last weekend has left Leverkusen seven points adrift of fourth-placed Schalke and eight behind their opponents tomorrow [Saturday], and Kiessling told ran.de that tomorrow's [Saturday] clash is a classic six-pointer.
"(Director of sport) Rudi Voller has spoken about this being a 'big-points' game and the team shares that view and knows what it means," he said.
"Fourth place from two seasons ago and second spot last year have set a very high standard, but that is fair because we know that we have a team which has the potential to reach such positions again.
"Apart from the Barcelona and Wolfsburg games, we have been in good form lately and I am convinced that we can extend this spell.
"For that, of course we must win our home game against Gladbach."
Gladbach are under less pressure since the expectations were never so high for them after they only just avoided relegation last season.
However, after picking up only two points from their last three games, all of their good work so far this season could still come undone and their coach Lucien Favre says his side "only have key matches" left this season.
"This is a game like any other for us," said Gladbach midfielder Marco Reus in the WAZ newspaper.
"Maybe Leverkusen's rather attacking style of play actually suits us."
Should Gladbach not manage to uphold their place in the top six until the end of the season, they still have another shot at qualifying for the Europa League.
They host Bayern Munich in the semi-finals of the DFB-Pokal on Wednesday, but Favre says he is not yet thinking about that game.
"We are totally fixated with Leverkusen," he said. "We may only concentrate on that game and not on the cup game against Bayern."
Favre will be glad to have a fully-fit squad for both games, apart from Patrick Hermann, who is recovering from a broken collarbone.
Leverkusen should also be almost at full strength, although Stefan Reinartz, Simon Rolfes and Renato Augusto are carrying knocks.
Only the long-term injury absentees Rene Adler, Michael Ballack, Sidney Sam, Lars Bender and Tranquillo Barnetta are still unavailable.