Hi I'm new to the forum and have a problem with my Mercedes E200 Kompressor. I recently had the Air Mass replaced and since thenI have had an increase in fuel consumption. I was getting between 30 - 35 MPG but now am only getting 20 - 25 MPG. I have had the car back at the garage but he has informed me that everthing is reading right. It may be that the improved performance is costing me more in fuel??? If anybody has any info could they let me know..........

 

The old air mass meter was giving you a false fuel economy, due to the heavy intakes of air v fuel ratio your car should be doing between 25 and 30 mpg
cheers
paulie88

 

As I suspected thanks very much for your help.....