dhaval

Hello All,

What fuel efficiency you get with your C300? I am getting 9.1 litre per 100km. I mostly drive in comfort mode. Not sure if it’s bad.

Anyone drive in sport or sports+ all the time? What’s the fuel efficiency you get?

Regards,
Dhaval

DaneDad

That's about 26 MPG... I get an average of 30 MPG in sport mode or 8 liters per 100 km

superswiss

All depends on how you are driving. Official figures are up to 22 mpg for city and up to 31 for highway. So the more city or stop&go you drive the lower it will be. A good source of real world mpg is fuelly. You seem to be right about at the average.

https://www.fuelly.com/car/mercedes-benz/c300

dhaval

Wow! 8 liters per 100km is not bad. I would start driving in sports mode after the fuel prices are down of course. 😀

Thanks. I will check the link.

Andy74

8l/100 km that is awesome.

dhaval

Anyone here drives on Sport+ mode?

I hardly feel any difference between sport and sport+.

Boom vang

I am getting 7.6/100km in the winter running 4 snows doing highway driving, best was 7.1; city driving is a whole different experience, if I get 12L/100 then I am lucky

dhaval

7.1 on highway? Woaaaahhh. Are you sure you’re driving a C300? 😀

FL W205

I've been getting 31.5 mpg or 7.47 l/100 per tank measured at the pump with 0 highway miles. I always leave it in comfort mode. I didn't buy my car for fuel efficiency and I am surprised by how well it does. This is all suburban/city driving but I go to work very early in the morning and come home before the afternoon rush hour.

dhaval

That’s great. I don’t drive my car for commute to work. I drive it over the weekend to get groceries or go for hiking. 300km trips around the weekend if I am going for outdoor activities.

But good to know you guys are getting good efficiency.

I think I drive aggressively. I accelerate to cover short distance and then break.

Paul9900

On a 3200 km trip back from Florida, I was averaging 6.4 l/100 km. Got as low as 6.3 at times. Getting about 12 around town.

dhaval

6.4 on highway is good. What’s your driving technique? I drive on average 120km per hour. I get 8.1 on highway.

Paul9900

I never really thought about about a strategy, but your post got me thinking. Indeed, I was trying to see how low I could get that number. I was doing everything possible to get it as low as possible. I drove 90% interstate highways at an average of about 75 MPH. At least 10% above the speed limit to keep up with the traffic. I would try to keep a fairly large distance between me and the car in front so as to not have to break whenever they did. I would coast as long as possible. I usually drove in centre lane (where there were 3 lanes) and moved over to fast lane when approaching a busy on ramp to avoid possibly of having to break. I would break only when absolutely necessary, preferring to keep spacing, speed, and lane changes as alternatives to following close to cars in front. I used cruise control whenever possible, but that only amounted to about 10-15 percent of the time due to traffic. Other than my obsession with NOT breaking unless absolutely necessary, that is about it.

dhaval

This make sense. I have never focused on that while driving and that could be the reason behind why I get less fuel efficiency than you on highways.

Even in the city I do bit of an aggressive driving and break a lot. Gotta change that.

Paul9900

I hope the above picture comes out OK. To add another data bit, Yesterday, I drove from New Hampshire to Nova Scotia on 90% Interstate/100 Series highways. As you can see, the 1000+km drive at avarage 120 KPH (the 100 shown includes stops, etc), and the mileage was 7.2 l/100km. I was racking my brain trying to figure out why mileage was at least 10% worse than previous days! My driving was about the same and similar speeds but with much less traffic. . I use 93 Octane fuel (always do). Weather was coor and terrain was less hilly than previous days, so I thought I might get improved mileage. Not so! The only other difference was an additiional 140 pounds when I picked up my wife in New Hampshire (she flys most of the way much to my relief).
So, other than the additional weight, everything pointed to getting even better mileage. Not sure if that weight would make that much difference so hoping some of the experts on this forum might comment on that. The only other thing I was thinking is that the gas station was actually selling 87 or 90 Octane fuel and calling it 93 Octane??
Would love to hear comments on the issue. Thanks.

dhaval

Did you drive where there are a lot of climbs?

Paul9900

No. Definitely not. As I said, the terrain is much more level than in West Virginia, Virginia, and Pennsylvania.

dhaval

I am sorry. I am not aware of terrains in those areas.

justanick

I’m driving 2015 C250. No mechanical issues always service in MB. My fuel efficiency is 13 L/100km city driving in Comfort mode. Average 25km/hr.
Is something wrong with my car?

dhaval

Thats not a good efficiency. Something is wrong. You always got that efficiency?

justanick

I checked my records in MB adapter app and another app I use. My average is 11.67 L/km for two years including highways. I don’t drive much except weekends or groceries.

dhaval

Mine is 9.1 average in a year

justanick

Are you driving in comfort mode?
I think I changed some settings even though I’m using the stock comfort mode key.

Could you please let me know what settings should I use?

dhaval

Yup always in comfort mode. Tried to drive 2 days in sports but the bad roads in my town makes it uncomfortable drive in sport mode

justanick

Today I realised my C250 after full tank it shows 580km and before I even rolled the wheels it showed 20L/KM. WTH !!!
do you guys get the same / similar reading?