For a start always use 98 fuel , as last resort 95 to get you to a place that has 98.
Much has been written on this forum about the T5 engine issues.
If the K&N filter is oiled , please remove it and put a stock Volvo one in as the oil destroys the sensor and that filter only gives you some extra intake noise.
Where are you? We can advise a good independent Volvo shop.
*average speed indicator on the dash screen is not indicative of how the car was treated.
Have good mechanic check out the condition of all fluids and replace them as well.
