i have C230 kompressor 99....it spend 20litre / 100 mile, is that normal or i have a problem somewhere plz reply

 

Hello mate it my be your lambder sensor. This measures the oxygen going your engine. If its broken it will put too much fuel in it. Does your exhaust fumes smell very rich? If so that would be the problem

 

dude, does this sensor has an indicate on the dashboard a sign for example 'check engine'?
because nothing appears in dashboard.

concerning the smell when the speed exceed the 120km or 75 mile sometimes i smell it inside my car...is it a sign ..?

 

When a car runs lean the computer will dump more fuel to compensate. It can also be a exhaust leak maybe, dirty air filter, or bad sensor like mentioned that reads air flow.