I've owned my 220d for 3 years, with only 27,000 miles & a full lexus service history. It has just started to run a little rough. When it's cold, it feels to have hardly any power until 1,500 revs, when the turbo kicks in. I have given it a good blast down the motorway, where it feels ok, but when driving at low revs, it feels a bit spluttery. Does anyone have any ideas, bfore I take it to the main dealer, as I am expecting a hefty bill?