So what kind of power is it putting out stock? 181 wheel horsepower. This is well behind its competition as the BMW N20 four-cylinder is greatly underrated and showing numbers in the ~230 wheel horsepower range stock. That is a fairly large discrepancy at the wheels considering the difference at the crank between the two is only 32 horsepower (208 horsepower for the Mercedes M270 versus 240 for the BMW N20).
The reality at the wheels is almost 50 horsepower showing somebody is downplaying their crank ratings a bit. Mercedes really should up the output a bit to compete with the Audi 2.0T and BMW N20 as they are trailing quite a bit in output.
Dyno courtesy of HG Motorsports on their Dyno Dynamics which they say reads conservatively compared to a Dynojet. We will have to see Dynojet numbers from the CLA250 to know for sure but the motor definitely will benefit from (and almost needs) some tuning.