2000 CLK430 - Error codes P0173 & P0170 - NOW WHAT

I have a 2000 CLK430. My yellow Check Engine light came on. I have two Error codes, They are P0173 & P0170. I changed the fuel filter but still get these codes.

NOW WHAT ????

Does anyone know what to do next ????

Change the Air Mass Meter and enjoy......They cost around 200-250 online and can be changed in 20 minutes. Car will run much better.