OM651 with Delphi CRD-2 control unit. Almost every tuner has his own opinion on his Delphi ECU, and it’s not a good one. It’s difficult to work with, requires special tools, and sometimes it bricks when you least expect it. This piece was easy and after a few hours of work we got good results. We all know that the OM651 is not the most reliable Merc engine and not a super turbo variant. It has many ecological systems.
This car still had diesel particulate filter (DPF), so we didn’t put too much pressure on it, as it creates back pressure. 210 HP is good result for this engine.