Not a typo, no egg between my foot and the pedal, and not Imperial (5 quart) gallons, either.

I picked up the new C63 at the dealer in NC last Thurs. and shot right up to Richmond for the NASCAR weekend. I got 21.1 mpg at mostly 70 or so, and did 20.2 on the return trip.

I did some around town driving during the week, then zoomed down to Darlington this Thursday night... 140 miles of fast two lane blacktop all the way... trip computer readout: 21.7 mpg!

I'm sure once the break-in period ends (sometime next week) my right foot will get heavier and the overall figure will plummet. But I'm very encouraged about the potential for highway mileage of over 20 mpg.

You must have gotten the new hybrid version

You must be driving it wrong!

I didn't know people who bought this car cared about MPG lol. I havent checked mine once.

Most of us don't. Seems like an odd thing to lease/buy when you have this concern.

There's a MPG reading somewhere? Only thing I ever see is ESP SPORT, and ESP OFF.

how much gallon is a litre?
and how many km is a mile?


We don's use mph / gallon here :P

http://www.sciencemadesimple.net/fuel_economy.php here is a simple calculator to bounce between mpg and km/liter.

yeah it will drop alot after you cross the 1k mark. i was getting like 19 its down to like 13 now hehe. ive got 1200 miles on mine now. did the 1k in a week. im just using up all the gas i saved last year with the mini cooper.

If you drive it like a normal car it will take about 13-16 litters per 100 Km in the city and 9,5-11 on the highway. I've tried and these are the numbers. Which are great, I think.

But it's very hard to drive it like a regular car indeed

Your figures seem surprisingly good.

Typical week morning and afternoon traffic give me around 18l-20l/100km, (if I get stuck in peak hour crawl, consumption climbs to 22-26l/100km).

This is due to the fact the first 10km or so from home, I can average 13-14l/100km but the last 10km through the city returns around 20l/100km. Thus setting my overall average to work in the 18-20l/100km bracket.

Best highway day was a fill up after 467km, put 52.69l in it i.e. 11.28l/100km.

I've seen the display 'FROM START' drop into the 10's but it's impossible to maintain that low a number in a normal highway driving day, too many stop/starts (or slow downs) through towns, traffic hold ups, roadwork’s, etc. to achieve a sub 11 for a tank full of fuel.

Overall, I've had the car for 180 days and 9740km and fill up every 5.3 days with an average consumption of 19.18l/100km.

Probably, because I don't drive in rush our traffic. That explains it.

i hope you didn't keep the rpms at the same level while you were driving on the highway. during the first 1000 miles, you should not keep the rpms constant.

Exactly what I was thinking.

I average 19 MPG from Washington DC to New York City 250 miles or so.

during the week I get around 11 to 13 MPG, and that's my wife driving it.

This car is a gas, oil and tire burner !!!!!! DRIVE THE CAR ALREADY!

One more thing you dont need to break-in the car. AMG did that at the factory already. This cars have an averge of 2000 miles on the engines before leaving the AMG factory. So drive them fast as soon as you get the keys. (I used to work for Mercedes Benz)

What about the other components? I believe the break-in is moreso to do with the tranny.

the engine is the biggest concern to AMG!

Thanks for the comments...

Proper break-in procedures were observed (no long runs at sustained RPM, half-throttle or less, no kickdown).

Not a lot of stop and go traffic to deal with except taking the kids' to school or down at the lake... lots of highway and open road in the Carolina piedmont.

Now at 1600 miles (12 days from new), still averaging 20+ mpg, and really enjoying the drive!