my c200 98 model 202 has a governing problem

[shoezee]

my car used to be governed at 180 km/h but now it goes back to 80 sometimes 100 or 120. its first gear doesnt hav power or kick so can any body please help me out:-(

 

[television]

First port of call would be the MAF if it has one

 

[shoezee]

thanks a lot my car is doing what is suppose to do
many thanks