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Thunder2 posted a topic in E60/E61 2004-2010Hi, I've been reading lots about rough idles on the 545i but haven't found a definitive answer or same set of circumstances. I have a 545i, 2004, 108k on the clock. It runs lovely, lots of power and very smooth. Except: In the mornings, it runs like there's an error in the fuel mix. It stays at about 500rpm and is close to cutting out, as if it's running on 7 cylinders. However, after about 10 minutes of running rough, I can switch it off and, on startup, it'll be fine for the rest of the day. So, it's just rough when cold. I've had the coil packs changed, it's been serviced, spark plugs, etc. Could it be a sensor or something, giving the wrong readings so getting the fuel mix wrong, up until it comes up to a standard running temperature? It doesn't give any error codes, but it comes up with Engine Malfunction. Any ideas or pointers would be very much appreciated. Cheers, Ron P.s., And what's with the car not having a temperature gauge? What happens if it gets hot???