Hello to all here, Also I have had for about 1 month the message “motor maintenance required”. Only in contrast to the whole cases described here I have no remarkable power loss. However Rust mine now stronger than before, if one accelerates out of low speeds (kick-down) And it whistles from time to time when one gives full throttle. As if one draws air through sharpened lips. My shady picture it looks so that the message appears in the following cases. The speed changes, that is, after longer rides at low speed and then kick-down. For high speed rides on the motorway 180 + For abrupt braking manoeuvres For cruises with cruise control, but always only after switching off the cruise control when again fully accelerated after braking. I have already asked some and everyone says something different, but all come somewhere central to a point somewhere a very small amount of false air comes into the system. give advice where I should start looking for causes and what the bad part could be I drive a V70 built in 2003; EZ 2004 2.5D KeyNo. 9101, 85301L 3 Thanks in advance