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Member "willygan" started an interesting thread about C400 fuel economy numbers, so I thought it might be appropriate to see what the real world numbers for the C300 look like.
In my case, with still just under 2,000 miles on the car, I have seen numbers as high as 33.5 mpg on a level road at steady speed, and as low as 23 with all local driving. My winter numbers are dropping, but we do get a "winter blend" of gas here that seems to be less frugal. The car does get more idling time now with the frigid temps, and I'm also running four snow tires now,
I have not reset my overall average fuel mileage on the computer since purchase, and it now shows 26.7 mpg. Until a week ago, it was holding at a constant 27.3, but I've done quite a bit of harsh winter driving in the last few days.
All numbers are from the onboard computer. I have performed two measured checks, and they agree with those numbers to within just tenths of a mile per gallon. This would seem to be the most accurate computer I've yet seen on any car ... don't know why, but I'll do more checks in the future and see if that level of accuracy is consistent.
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Winter gasoline has more light ends & is lower density to aid cold starting & running. It thus contains less energy & will have an adverse effect on fuel consumption.
I've been using fueleconomy.gov to keep track of my MPG. Here's a screenshot of what I have so far. Have been using ECO mode 98% of the time. Don't run A/C or roll down my windows.
I've been using fueleconomy.gov to keep track of my MPG. Here's a screenshot of what I have so far. Have been using ECO mode 98% of the time. Don't run A/C or roll down my windows.
It's not bad. I hope it gets better over time.
Thanks for those numbers. That's very similar to my typical mileage with about a 20/80 local and highway mix. I seldom get to travel on a truly level road though, since I live in very hilly country. The one level run I was able to find was the one that generated over 33 mpg.
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
For scrawny US Gallons those are good numbers with more to come as engines loosen up. These units are certainly frugal helped by the 722.9 Plus transmission. Roll on the 9 speed.
This, being my first Mercedes product, is all very new to me. I can tell you all about the Porsche 981 Boxster, the Volvo S60, and the Audi A4, even the BMW Z3 and Z4, but I've still got a lot to learn about the C Class.
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
And I can tell you very little about the Porsche's other than a close friend has just sold his Boxster S & replaced it with a Cayman R PDK. I found both cars enormous fun to drive although they probably brought out the hooligan in me. The Benz tends to calm me down. Probably better that way.
I can confirm my numbers are in line with what is being posted in this thread - which are higher than expected.
I came from a GL450 where my computer stayed steady at 14.7 MPG. Seeing my overall MPG (having not reset since I bought the car) be at 27.1 is very nice.
i may be picking one up on Friday in LA and driving back to SF.
can someone tell me what the break-in procedure is as i'm driving 400 miles back home.
thx.
PL
i may be picking one up on Friday in LA and driving back to SF.
can someone tell me what the break-in procedure is as i'm driving 400 miles back home.
thx.
PL
I would take a lot of off ramps and on ramps so you vary the speed and RPM's. It may add a couple of hours to your trip, but a proper break-in is very important. You don't want to drive at constant highway speeds for hours on end.
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Originally Posted by bzliteyear
i may be picking one up on Friday in LA and driving back to SF.
can someone tell me what the break-in procedure is as i'm driving 400 miles back home.
thx.
PL
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