Home >> Audi >> 2015 >> A4 Premium Plus >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 2.0L - Cylinder Head & VALVETRAIN - Engine Code(S): CAEB, CAED, CPMA & CPMB (Sedan) >> 15 Cylinder Head, VALVETRAIN >> Cylinder Head >> Overview - Cylinder Head >> Cylinder Head, Checking for Distortion