The experienced midfielder acknowledges that winning the title might be too much to ask, accepting that Jurgen Klopp's side are now targeting second place instead
The reigning champions are the only side in the German top flight to remain unbeaten so far and Kehl concedes that it will be nearly impossible to catch them in the title race.
The experienced midfielder has therefore set his sights on second place in the table and is confident that Dortmund have what it takes to achieve it.
"The big comeback? Well, it's nearly impossible to catch up with Bayern but our target is to be in second place," Kehl told reporters.
"All in all, we are pretty convinced we will be there at the end of the season.
"There are many objectives we have as a team - being more successful, getting back to the football we used to play and climbing up the standings - but also everybody has personal ones. Their health is one of the biggest wishes.
"We have a lot of work ahead of us. There will be a lot of training. That's why we can be excited to have an intensive time and then to get started all over again."
Dortmund return to league action at the end of January against Augsburg and face Zenit St Petersburg in the last 16 of the Champions League.