CB Engineering ML320 W164, GL320 Z164 CDI DPF Delete Pipe for the 2007-2008 vehicles. These will not work on the Bluetec motors with the Urea Injection. These DPF delete pipes are made from 304 Mandrel Bent stainless steel tubing. They bolt in with zero modifications to exhaust system. You use your existing front and rear clamps. Requires proper ECM tuning to run this product.