E 200 CDI-2003-engine loose power-help!
 

Hi there! my MB loose power suddenly when i am running round 100-120Km/h or if i use automatic pilot,and the engine don't accelerate more than 3000rpm.If i turn off the ignition for a few seconds and then i start again the car it work for a while and then...the same situation.The car was taxi in Germany and it has a lot of km.Can somebody help me ? Thank's.