When accelerating there is no power but when releasing accelerator slowly power picks up. why is this happening 2001 ml270 cdi

Hi, this is a common symptom of a clogged fuel filter that is straining the fuel pump itself.

When you accelerate, this initiates a rapid fuel flow through the lines. if the filter cant pass the proper amount, its will stall or hesitate the engine and cause sputtering or loss of power. due to this clogged filter, the pump cant keep up with your acceleration demands at this time. the reason for the power pick up upon De acceleration, is because the lower amount of fuel is able to pass through quite easily but, as soon as you demand more power, the clog will obstruct the more intense flow of fuel to the injectors.

Simply replacing the fuel filter and pump will fix this issue.

Please rate and god bless:)

My 2005 c230 has aproblem lik when I’m accelerating hard it gives me random misfire code p0300 and p0301 I checked spark plugs and the coiles they look fine and even the fuel injectors and clean also the maf but the problem still , on the normal drive the car is fine the problem just appears when accelerating hard please help to figure out

A broken catalytic converter may cause something like this