bartels filled in at lotus for johnny herbert, who had commitments in japanese formula 3000, at four grands prix during the formula one season, but failed to qualify at all four races. bartels continued in f3000, finishing 4th in 1992, before switching to the dtm in 1994, where he continued to race until the series ended at the end of 1996. bartels raced in the super tourenwagen cup for the next three years, before the dtm was resurrected in 2000. he won the 24 hours nürburgring in 2000 (in a works porsche 911 gt3) and 2001 (in a chrysler viper gts-r).