No problem.

Here's the the general OM642 parts, the DPF delete is under mercedes. I'm assuming the same DPF was used on the ML and the E series.
OM642 Engine Parts | CB Engineering

Here's the tune I went with as I had problems with people confirming if their tune would work with US spec models. I'm having a few issues but still uncertain if mine are hardware or tuning issues but Miguel as been very patient with me. It's pricey as you have to use a powergate hand held programmer to reflash your ECU.
Mercedes Benz tuning