Home › Audi › 2014 › A7 Quattro TDI Premium Plus › Repair and Diagnosis › Engine Performance › Ignition System › 3.0L - Ignition/Glow Plug System - Engine Code: CPNB › 28 Ignition/Glow Plug System › Glow Plug System › Glow Plug, Removing And Installing › Tightening Specifications