This 2004 Mercedes-Benz E 270 CDI arrived with modified engine software, but the driver was not feeling the expected increase in performance. The initial dyno run produced 173–174 hp and 398–399 Nm, close to the factory figures cited for the engine: 177 hp and 400 Nm.

After reading the existing ECU file, AutoChip prepared and installed a new calibration. The first dyno run showed 207 hp and 661 Nm. Repeat runs produced approximately 201–202 hp and 650–661 Nm. The video attributes the variation to temperature; the engine and cooling-system protection limits were kept active.

Performance was assessed using dyno measurements against the previous software, rather than relying only on how the car felt on the road.