Under Heynckes this season, Bayern failed to stop domestic rivals Borussia Dortmund from claiming a second successive Bundesliga title but performed against the odds in Europe to progress to the UEFA Champions League final.
With this year's final being held at the Bayern's Allianz Arena, the home side are favourites to win the title against a Chelsea side who will be without several key players due to suspensions including Blues skipper John Terry.
Should Heynckes lead Bayern to their fifth European Cup, it will go down as a remarkable achievement considering the Bavarians had to overcome a tough qualifying group as well as Spanish La Liga leaders Real Madrid in the semi-finals just to reach the final.
As a result, it had been suggested that the 66-year-old Heynckes might opt for an early retirement should his side beat Chelsea on May 19.
"Jupp is not made that way, he has no such thoughts," Rummenigge told Bild.
"Jupp is a special character in this respect. And if he wants, he could stay longer than when his contract expires in 2013."
Rummenigge also revealed that there has been no fallout from the dressing room punch-up between Franck Ribery and Arjen Robben.
"The issue is completely settled. Both were key players for our success in Madrid on Wednesday," he said.
"The incident was of course not OK.
"But my theory is that this explosion was a spark that provided a boost. Although I know that had we lost, we would be speaking differently today."
Bayern return to domestic action this Saturday with a Bundesliga fixture against Stuttgart.