The 2.9 L engine in the Mercedes-Benz GLE Class is at the top end of what this displacement produces — serious injection pressure, sophisticated turbocharger management, and a factory calibration that leaves room on the table by design. These engines are well-engineered enough that a careful, dyno-developed map extracts meaningful gains without asking anything the hardware isn't already built to handle.
Our dyno-developed map for the Mercedes-Benz GLE Class adds an average of 50 kW (26%) at the wheels and 182 Nm (26%) of engine torque. At this level the car genuinely changes character — overtaking on single-lane highways stops being a commitment, and the mid-range pull from around 1,500 to 3,000 rpm is transformed. You notice it most on the highway on-ramp and in the first third of an overtake.
In practical terms, that works out to around 9 fewer tanks of diesel over 40,000 km. At a typical 15,000 km annual mileage, most Mercedes-Benz GLE Class owners save roughly 231 L and $277 per year at the pump — purely from improved combustion efficiency at part-throttle, where diesels spend most of their time.
This Mercedes-Benz GLE Class variant ran from 2020–2022. The factory calibration changed very little across that production window; we have the original file for each year and always confirm which one matches the car in front of us before we start.
Mercedes-Benz OM656
The OM656 inline-six is the spiritual successor to the brilliant OM613. It runs higher injection pressure than its predecessors and rewards a careful, dyno-developed remap.