2011 ML350 Slow to accelerate
There are no engine management warning lights on and the oil levels are correct for all aspects.
The car will no go over 3000 rpm when stood or when driven. This was intermittent at first but today a whining noise appeared when revving the car and the power has dropped off completely to as detailed above.
I have checked what I can but am concerned as to drive it although when above 60mph the noise almost disappears.
Any thoughts


