C230K feeling slower?

My car has been feeling slower lately. I dont know if it is because of the weather or not but the throttle response is definitely more delayed. It is not quick off the line like it used to be. Even in automanual mode....
I have a K&N filter with custom intake and a Eurocharged Tune.
Has anyone else felt this problem? What could it be?
My car has been feeling slower lately. I dont know if it is because of the weather or not but the throttle response is definitely more delayed. It is not quick off the line like it used to be. Even in automanual mode....
I have a K&N filter with custom intake and a Eurocharged Tune.
Has anyone else felt this problem? What could it be?
whenever i clean mine (not often enough), my car feels like it breathes much better... and i feel that the throttle response is better.


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I'd also say that ambient air temp plays a huge role with our cars... in winter it's noticeably faster and can chirp and spin 2nd a bit, 70 degree's and it's noticeably slower.
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I'd also say that ambient air temp plays a huge role with our cars... in winter it's noticeably faster and can chirp and spin 2nd a bit, 70 degree's and it's noticeably slower.
I wouldnt care so much but I hate how slow the car gets!!!
Any car is going to run a little peppier with a colder/denser IAT.
However what you're reporting doesnt sound normal.
I'm not an M271 owner, or Id propose some things to check.
My first thought would be something to do with the supercharger. Not everything is going to necessarily have a CEL pop up, especially if the problem isn't full-blown.
The car isn't misfiring or hear a pinging is it?
Is there not anything that anyone with a m271 can think of that could be causing this without a CEL?
How many miles on the car? When was it tuned? Mail-order or cable-tune?
Cleaning the K&N shouldn't be a fix for this degree of hesitation that you feel.
While on that subject - I hear of folks cleaning their filters wayyyy too often. Obviously K&N has struck gold with the marketing ploy behind offering their "recharge" kit. Also sounds like a good way to clog up a MAF with filter oil.
Changed your fuel filter ever?

There's about 62k miles at the moment. I got it tuned around 59k I believe. The car is not misfiring.
LILBENZ- The trans isnt slipping, its catching its gear but the acceleration was so poor. This might just be weather related because like I said, the car was pulling great this weekend at night. Maybe I just wasnt used to warm weather in it? Ive only had the car since sept/oct..

That is awesome!! I wonder if Jerry at Eurocharged can do that for me... I was thinking we can get bigger intercoolers so that our S/C can get more, cooler air.
Also, how is your intake set up? Do you have a custom one?
When I pull over on the highway the intake itself is much much colder in comparison to any other part in the engine or any part of the airbox that is unwrapped, my engine temp meter has been consistently lower too
I doubt the fleece mb tube that tends to tear on it's own would cool air more effectively.
It's been my thought that the fleece tube Mercedes uses for the intake is to avoid water ingestion. I could be wrong on that one.

It's been my thought that the fleece tube Mercedes uses for the intake is to avoid water ingestion. I could be wrong on that one.
Why would you want the mouth to feed the box? That would mean it got 100% hot air from the engine bay. Granted it probably wouldn't make that much difference but the car will gain nothing from that and might possibly lose, but not significantly.
Replaced:
-Fuel filter
-spark Plugs(shouldve done a bit earlier)
-battery
-new set of k&n's
I have to say, the battery is what really did it for me. I felt the difference instantly. Apparently the sport models need more juice so you need to replace the batteries more often.
Fuel filter should be replaced every 30k miles(do it with the tranny fluid) and k&n's should be cleaned every oil change(7.5k miles for me).
These cars are sensitive. Also, they are cold air intake so when its warmer/humid outside, they will run like pigs. Almost the same as a turbo'd car in high altitude.
The guys are correct about engine temps, the air-intake system has abosolutely nothing to do with engine temp. That is a totally separate deal, read: the radiator/coolant system. If you're reading a lower engine temp, that does have something to do with your thermostat, and could possibly mean it's stuck open/broken.
Now there is an IAT sensor that detects the temperature of the incoming air into the intake system, relates in part to the engine's timing. This can only be read via the OBD. This temp can affect engine performance.


