How is "Produce less exhaust residuals, that other than smoke; hence it can reduce deposits in the exhaust system and the risk of its obstruction." said in German?

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
neben Rauch auch weniger Abgasrückstände produzieren; dadurch können Ablagerungen im Abgassystem und die Gefahr dessen Verstopfung reduziert werden.