10 cycles: Passing over forward at μ-low surface to tarmac (μ-high):- Driving with 1st gear locked on μ-low surface maintaining a constant vehicle speed of 20 km/h- 10 meters before reaching the μ-step-line proceed a WOT acceleration- Passing over from μ-low surface to tarmac with all 4 wheels- Slow down by throttling back (lift the foot from the throttle pedal)- This procedure has to be repeated 10 times- After a number of 10 “passing over forward” cycles have been completed: A subjective evaluation of the power train (functional and noise behaviour) has to be executed by the test engineer.