Hello together I have now registered here in the forum because I already have sleepless nights because of my XC60 model: XC60 2,0 edrive Bj2011 model year 2012, have still warranty until 28.09.13 had the annual customer service in Volvo specialist workshop 2 years with Km stand 33000 and software update on 31.08.13 then I drove about 180 km and stopped at an event. The evening after the event when driving back came after about 1km the message “Motor system maintenance required On 01.09.13 in the morning message checked, no vehicle report available. At noon after approx. 25 km drive came again the message “motor system maintenance required”. on 02.09.13 workshop called, the friendly lady advised me to call the Vovo Assistance. I did and after an hour was also friendly staff there, in the presence of my wife he has read out the error memory but no My wife at lunch time in the Volvo workshop who then read out the error memory, all levels and there was a message available, error in level 2 “ECM-P029900” . Man has now deleted the error memory and looked through the car and found nothing. In addition, the oil indicator has been adjusted, as this after the customer service and the approx. 300km driven track only 2/4 in the electronic After the last oil change it indicated 4/4 with this filling quantity. Then woman with car drove home again the 30 km and put the car in the garage where it stood until 06.09.13. On 06.09.13 my wife then went to work and see there the message came after approx. 7 km again. On Friday and Saturday the message was once there and sometimes not there. On Friday then still with the measuring rod indicated now 3/4. On Monday 09.09.13 I get a car rental for 3 days. Besides that, the display of the oil stand was only 2/4. I have the feeling that maybe not the complete 5,9ltr have been filled in. In theory, it can actually only be a contact problem or a hose mounting problem, since various plugs and hoses are removed during the oil filter change. Can the software update be responsible for the oil display. Have the feeling that the workshops are a little overburdened with the state of the art. Let’s see what the workshop finds out for the next 3 days. Greetings Klaus