My mercedes a170 2005 just lost power it idles but when you push the accelerator nothing happens. it doesnt respond. i have replaced the throttle valve sensor but still nothing. PLEASE HELP!!

I would inspect carb and see what the difference is between 1/2 choke and no choke. Set the choke, move the throttle and look into carb- doesnt need to be running. Sounds like something is still restricting airflow at no choke.

This has nothing to do with the Catalytic converter ! Plugged catalytic converters don't go away after shutting off the vehicle !
This reduced engine power has to do with the
Throttle Actuator Control (TAC) System
Reduced Engine Power Mode When the ECM detects a condition with the TAC system, the ECM may enter a reduced engine power mode. Reduced engine power may cause one or more of the following conditions:
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Acceleration limiting--The ECM will continue to use the accelerator pedal for throttle control; however, the vehicle acceleration is limited.

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Limited throttle mode--The ECM will continue to use the accelerator pedal for throttle control; however, the maximum throttle opening is limited.

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Throttle default mode--The ECM will turn off the throttle actuator motor and the throttle will return to the spring loaded default position.

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Forced idle mode--The ECM will perform the following actions:

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Limit engine speed to idle by positioning the throttle position, or by controlling the fuel and spark if the throttle is turned off.

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Ignore the accelerator pedal input.

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Engine shutdown mode--The ECM will disable fuel and de-energize the throttle actuator.

2001, is most likely drive by cable. check the plastic clips at the throttle body and the gas pedal. They break. If it was drive by wire. it would have thrown a code. You can't buy the clips. replace the cable

Look for where the throttle cable connects at the throttle body. If you can move the throttle plate here and get the engine to respond, then the cable is either broken or disconnected at one end or the other. Any other situation doesn't seem likely.

sounds like bad throttle posistion sensor

check fuel filter and pressure , it is a common failure when the fuel filter is cloged or fuel pump

run the fault codes
indicates an idle control sensor or other throttle / accelerator sensors

This is a "Drive by wire" car on the throttle. There is no accelerator cable, it has an electrical sensor that tells the engine computer when you accelerate.

Sounds like the sensor is going bad. Take it to a shop and get it replaced.

i have a f350 ps and it starts and idles but i have no throttle nothing happens when i push the pedal and the check engine light comes on

check your throttle position sensor