Changing ecu / do you lose hp
#28
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So, swapping all the other parts means your car now "thinks" it's that ML500 donor. The CLK500 and ML500 have the same engine, but the ML500's lower HP is due to a change in engine program to give the heavier ML a bit more torque at various points on the power curve. In real world driving, it may not make a difference at all, but it will be different than a stock CLK500.