Are you having problems with your 2012 Alfa Romeo 159? Let our team of motoring experts keep you up to date with all of the latest 2012 Alfa Romeo 159 issues & faults. We have gathered all of the most frequently asked questions and problems relating to the 2012 Alfa Romeo 159 in one spot to help you decide if it's a smart buy.
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Premium diesel does have a detergent in it to cleans the fuel system, which could be why you are feeling an improvement in its running.