[slklover1]

I recently purchased a Mercedes Benz SLK 320 2004 and had no problems while driving home. After a couple of days of driving it i noticed that after flooring the gas pedal once car looses all its power and doesn't respond after that. No matter how hard I try the car just revs and accelerates like a Nissan Micra.

I know for a fact that it doesn't have to do with the transmission because the problem is not that it doesn't downshift rather the pedal respons is just dead. I tried to downshift manually to second gear and the car accelerates slowly as if I wasn't pressing down the gas pedal at all.

I searched the forum and other sites and came across a problem that many others had with MFA and I am unsure if it is the thing that causes the problem for me. And there is no check engine light as long as I don't press down the kickdown but after pressing it the light comes on, car slows down and it doesn't go away until I turn off the engine and start it over again. Then the problem goes away and comes back again after kickdown. Any suggestions to save me replacing parts blindly?

 

[Dylan]

Easiest thing to do is go get it scanned. Even a generic obd2 scanner can tell you what codes are being tripped when the light comes on. Even if the light it off, it will still be saved as a stored code. From this, its a lot easier to diagnose.

 

[slklover1]

I got it scanned and it said something about the gas pedal. Will it be enough to change the gas pedal and the components that it has?

 

[ki5yk]

I expect the electronic accelerator pedal sensor has a partial fault. Your symptom matches the emergency running mode for detected sensor failure.

Also attached a photo of the sensor module above the pedal.

Regards,