Mercedes is not Saturn buddy
But is one thing that you are right in-I use to have a Dodge R/T,I put CAI(Cold Air Intake)and the car was realy faster. But,2 months after this on the highway the car just loose power on 3000rpm and stop?? Check it-was fuel pump fuse,I change 10 fuses and inspect all electric system-nothing?? So many people did diagnostics-nothing?? Finaly the car was without the custom filter because working on it,I drove it and BUM-this was the problem! So sometimes we can use old experience yes,but not 1:1 from USA cars to Benz.
Finally-I found the problem,my Benz is done and running better than ever!!!
If somebody have Mero with supercharged 4 cylinder engine like mine,I suggest them to clean their MAF Sensor with CRC MAF Sensor Cleaner(on their own risk I'm not taking responsibility),and you will feel that your car gain a lot of power,now the car is VERY fast for 4 cylinder!
Thanks to the great Threat:
I find and fix the problem-by taking off and cleaning the MAF,and because I know that sometimes K&N cost MAF problems,my car was with K&N before and then the problem came,that's why I assume that is may be there and the first think that I did was to take the K&N off the car.
Thanks to MarcusF and the other people with helpful posts in my threat,I didn't pass his suggestion-just when some car have a problem,we should start from the small thing and going to the big ones ,taht's my way. And yes after checking the fuel pump pressure I did check the exhaust backpressure and the temperature of the cat-the numbers was normal.
This is great forum with very experienced and good MB fans!
I'm glad that I did join it!