after this, he retired from the kanonloppet at the karlskoga circuit in sweden with fuel injection problems, before moving away from formula one as a driver. he subsequently entered two bkl lotus cars in the 1964 solitude grand prix for maring and german helicopter pilot joachim diel. diel's car was one of seven eliminated in wet-weather accidents on the first lap, but maring managed to finish 10th and last, four laps down on the leader – the only occasion on which one of kuhnke's cars finished a formula one race.