Hi all, I am now the proud owner of a 2008 A4 Avant S Line SE 170 (BRD ENGINE CODE) - returning to the Audis after a short stint on a Porsche Cayman (I have only just stopped crying at the depreciation!). After having 1.9TDIs and a couple of 2.0TDI 140s, I opted for the 170 as I do most of my driving on the motorway and A-roads. I have heard horror stories of DPF issues, injector issues, DMF issues - but stupidly I went for the 170 as the car is everything I've ever wanted in an Audi. My questions: 1. Are there any fuel additives to give the car a good clean out - mainly the injectors (does this actually help?) 2. Is it worth cleaning the EGR/MAF and how (or equiv - I know the BMW E39 3.0 diesels LOVE it when you do this!) 3. DFP - anything I can do besides removing it with an aftermarket exhaust? All I trying to do is "clean" the engine components that can easily be done as the car has probably been stood for a while before I bought it... previous owner (after I traced them) did 88K with no issues and loved the car. Thanks all.