2 questions
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MBWorld Fanatic!
Joined: Apr 2004
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From: Canada
C55 AMG, 135i, 911 GT3, GLE43 AMG
2 questions
Hi all. First time posting here. I drive a 2002 C240 Classic (Canadian base model) with the 5 speed auto.
I recently upgraded to 225/45 17 inch tires and rims from my stock size of 205/55 16 inch. I have noticed that my fuel efficiency has decreased slightly (according to my trip computer), especially on the highway, usually cruising anywhere between 100-120km/h. I have the tire pressures set to the factory recomended levels (32psi in the rear, 28 in the front). This is what the dealer recommended as well with the new tires/rims. The tires I have are Falken Ziex ZE512.
So my first question is this: has anyone noticed a change in their fuel efficiency when changing to wider tires and larger rims? My brother said that was possible given potentially higher rolling resistance of these wider performance tires compared to the stock Continentals.
My second question relates to anyone on this board who has experience with the Kleeman Super charger upgrade for the C240. Has anyone tried this? Any problems with future servicing or maintenance performed by the dealer? I posted this particular question on other forums, but I have heard close to nothing about it, other than the fact that the Mercedes warranty will almost certainly be voided.
I recently upgraded to 225/45 17 inch tires and rims from my stock size of 205/55 16 inch. I have noticed that my fuel efficiency has decreased slightly (according to my trip computer), especially on the highway, usually cruising anywhere between 100-120km/h. I have the tire pressures set to the factory recomended levels (32psi in the rear, 28 in the front). This is what the dealer recommended as well with the new tires/rims. The tires I have are Falken Ziex ZE512.
So my first question is this: has anyone noticed a change in their fuel efficiency when changing to wider tires and larger rims? My brother said that was possible given potentially higher rolling resistance of these wider performance tires compared to the stock Continentals.
My second question relates to anyone on this board who has experience with the Kleeman Super charger upgrade for the C240. Has anyone tried this? Any problems with future servicing or maintenance performed by the dealer? I posted this particular question on other forums, but I have heard close to nothing about it, other than the fact that the Mercedes warranty will almost certainly be voided.
MBWorld Fanatic!
Joined: Nov 2001
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From: Ashburn, VA
'19 GLC 300, '19 TM3SR+
From my experience, 32/28 is a bit on a low side. I use 36/32, and if feels perfect. Better control, and definitely better rim protection, especially now - until they repair all these fresh potholes.
Last edited by vadim; Apr 13, 2004 at 03:08 PM.
MBWorld Fanatic!
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Your new wheels are bigger and heavier, which means the car will need a bit more power to run them. So it is normal for the fuel efficiency to go down a bit.
I dont think a lot of people have installed the Kleemann supercharger upgrade on a C240, because with the price that you're paying, you can buy a C320 (or almost a 32).
I dont think a lot of people have installed the Kleemann supercharger upgrade on a C240, because with the price that you're paying, you can buy a C320 (or almost a 32).
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From: www.Traben-Trarbach.de
MPG+ ROLFCOPTER
Originally posted by 888c240
I changed mine from stock to 225 40/18 and the psi is 44. Check from the tire side wall, it should says ##psi.
I changed mine from stock to 225 40/18 and the psi is 44. Check from the tire side wall, it should says ##psi.
Follow the MB recommendations and adjust from there based on you load and driving habits. Check on the tire forum. I believe Luke from the tirerack made a statement regarding this.
MBWorld Fanatic!
Joined: Nov 2001
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From: Ashburn, VA
'19 GLC 300, '19 TM3SR+
Originally posted by 888c240
I changed mine from stock to 225 40/18 and the psi is 44. Check from the tire side wall, it should says ##psi.
I changed mine from stock to 225 40/18 and the psi is 44. Check from the tire side wall, it should says ##psi.
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MBWorld Fanatic!
Joined: Oct 2002
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From: San Diego, Ca
2003 Citron Green C230KMT
from the Mercedes-Benz website:
Z-rated tires are optimized for performance driving and may provide reduced ride comfort, increased tire noise, substantially increased treadwear and greater susceptibility to damage compared with H-rated tires.
Would this also apply to fuel consumption?
Z-rated tires are optimized for performance driving and may provide reduced ride comfort, increased tire noise, substantially increased treadwear and greater susceptibility to damage compared with H-rated tires.
Would this also apply to fuel consumption?
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