Mercedes ML320 W164 DIESEL- Problem With speed and receiving on steep way.
 

Hi, i have mercedes ml320 w164 diesel engine 2007 year production. Тhe last service i changed nozzles, fuel pump and air pump. I have problem on steep way. My Mercedes have problems like:
1.The speed declines
2.although press down on the accelerator, the speed declines
3.Very hard developing speed (runs as non-turbo)
4.WHEN I TURN OFF AND TURN ON AGAIN, HE IS FAST LIKE A PLANE :confused:
-----If anyone knows what the problem would be grateful
THANKS ...