Root Cause of the Problem - DETAILED Explanation abdul ..Quantity is Not Quality .POland is Not Germany .Its just a Low Cost Manufacturing Eastern European.Country. This is a Very Serious MANUFACTURING DEFECT & Very Bad Engineering. The Fiat Service Center Readymade Answer "Its Due to Polluted Diesel " in Petrol Pump is Polish,Italian Bullshit . Why Do More Powerful Sophisticated BMW Engines dont have this Problem ? "If you want a thing Done Well, do it yourself. ~ Napoleon Bonaparte"