Hello everybody, I need your advice again. Something really stupid happened to me. I was on the highway recently. Music was a little louder and car a little faster … Mountain down showed the speedo 240 and at some point I registered that I was still on the fourth gear and so I was in the red area for several minutes with 1,000 revolutions. After I switched – then immediately – in the 5th, the message “Motorsystem Maintenance Dr. This was accompanied by the failure of the cruise control and the light of the small red ‘(warning) triangle in the display. As I continued without maintenance and did not notice any restrictions or impairments on the ride, I then disconnected the battery for about five minutes. After that, the message had disappeared and the cruise control could also be activated again. Unfortunately, the joy of this kept only about one and a half minutes, then the message appeared again. . In the meantime I drove about 500 km, message was always on, but I did not notice any damage, impairment or similar, so I would like to save myself a visit to the friendly one. My questions are now: What may have been broken? Is there the possibility to delete the error memory – e.g. by longer disconnection of the battery or similar – so that I can save myself a repair or a visit to the friendly one? Or I have to go to a friendly or a free workshop – only to delete the error message? It is a Volvo S80 2.4 with 170 hp, built in 1999. I hope that I will find advice here again and thank you very much for your help! Best regards and thank you very much! Christian