I’m experiencing an intermittent problem with my new V40, T3 which has done 1 700 km. When pressing the stop/start button to turn the car off, there is a distinctive shudder as it shuts down. There is no pattern to this behavior. Sometimes it’s a smooth shutdown (no shudder) – other times a slight shudder, and occasionally a very pronounced shudder. The dealership is struggling to identify the problem and has already run 2 diagnostics and performed a software upgrade, all to no avail. Any suggestions to what may be causing this?