S mode better MPG
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From: Maryland
2009 Arctic White/Black C350 with NAV pkg, ipod integration, 40% HO tint, and 18" 5-spoke AMG wheels
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From: Europe
223.168 & 213.012 & 906.633 & 214.005
You are correctly setting the conditions same, the comparison would not make sense otherwise but if you have a look at the engine efficiency figures, it would give better mileage for the same given power at a lower rpm but higher load.
I've attached an example of an older MB engine, it should give an idea even if the data is not fresh.
For a given acceleration at a given speed you need certain engine power. The figure shows that this power is reached at a higher efficiency at a lower rpm in all typical cases rather than at a higher rpm where the engine load unavoidably gets reduced. This of course only works at the power levels that are reachable with a lower gear (which is always the case if we talk about transmission mode C against S).
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2008 C300 Sport, RWD, US
I typically get 30-31 mpg on my Sunday 200 mile drive. Its almost all highway driving with the cruise control set to 70mph.
Your wife my just not have driven far enough to get a true miles per gallon. Were you using the "since reset" or "since start" figures?
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From: NYC
S550
Originally Posted by JimPap;
That's really ....not very good.
I typically get 30-31 mpg on my Sunday 200 mile drive. Its almost all highway driving with the cruise control set to 70mph.
Your wife my just not have driven far enough to get a true miles per gallon. Were you using the "since reset" or "since start" figures?
I typically get 30-31 mpg on my Sunday 200 mile drive. Its almost all highway driving with the cruise control set to 70mph.
Your wife my just not have driven far enough to get a true miles per gallon. Were you using the "since reset" or "since start" figures?
Edit: btw filled up the night before and it was on 3/4 tank last night so the computer is actually showing higher mpg. (17 gallon tank which means about 4 gallons was used which should have taken me 80 miles not 60)
Last edited by clkcadet; Sep 3, 2010 at 12:40 PM.
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From: Orange County, CA
2010 C300 Sport, 2007 335i Sedan
Geez... I only get 21-22 mpg at best in C mode. Maybe I drive too aggressively. S mode is NEVER better than C, especially on the highway because I believe S mode never sees 7th gear.
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2008 C300 Sport, RWD, US
lkevinl
Its 1st gear that doesn't happen in "C" mode. 7th gear kicks in at around 53 mph. If you want to test it, drive 55 mph and move the transmission shifter to the left briefly. Note that your rpm increased and your dash display shows 6th gear.
Its 1st gear that doesn't happen in "C" mode. 7th gear kicks in at around 53 mph. If you want to test it, drive 55 mph and move the transmission shifter to the left briefly. Note that your rpm increased and your dash display shows 6th gear.
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2019 G70 6MT & 2022 Ford Maverick XL
The only thing C mode does is start the car off in 2nd gear. From there, all is the same. Also, if you go WOT from a stop even in C mode the car will use 1st gear. It should make absolutely no difference with MPGs, you're seeing things.
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From: NNJ
W204
I took a nice 80 mile drive out to The Hamptons today sticking my cruise control on 55 mph and on the C mode ...... well was i pleasantly surprised when i saw that i was able to hit an all time high mark of 33 MPG 
!! Driving back home still using the C mode but a little bit more aggressive drivign at about 65 / 70 mph i was still at about 25 MPG which i still dont think is that bad 
Soo with that being said if S mode provides better mileage....... what would've my MPG been in the morning if i was in S and doing 55 mph WOW ??
!! Driving back home still using the C mode but a little bit more aggressive drivign at about 65 / 70 mph i was still at about 25 MPG which i still dont think is that bad Soo with that being said if S mode provides better mileage....... what would've my MPG been in the morning if i was in S and doing 55 mph WOW ??
