Mercedes-Benz R-Class:MPG-Real World Numbers

I drove my 320 from MD to FL with a loaded cargo box on top, and filled to the brim inside - going 75-80 and got 25+ mpg. It's a marvel. Around town, stop and go can be down to 20, but average 22.5+ in day-to-day driving.

#17 of 23 Mpg report of R350 after first tank by johnwang378

Sep 22, 2009 (8:17 pm)

Bought a 07 R350 4Matic on labor day weekend. I got 24 mpg on highway. For first tank of gas, I got 20 mpg on the mix of highway and local. I was surprised to see such high number for a car this big.

#18 of 23 Mpg after 1st year by ctdan

Sep 25, 2009 (6:10 am)

I've had my 08 R350 for about 14 months mostly driven around town by wife but I was getting approx 17 in town and 22-24 on hwy on the stock tires (Continental Contact). I had to replace those crummy treads after only 15k and a few months ago put on a set of Toyo All Country. Now smoother ride and bump in mpg of about 2 mpg for both in town and on hwy miles.

#19 of 23 Re: cdi mpg [wopel] by dspicher

Nov 24, 2009 (5:08 pm)

Replying to: wopel (Feb 18, 2008 12:21 pm)

Same experience... 2007 R320 CDI... Hwy - high 20s; Around town - low 20s.

#20 of 23 diesel or not by nominivan4me

Feb 05, 2010 (1:28 am)

I am in the market for R350 but can't decide whether I should go diesel or not. Please help!!

Replies to this message:

wopel (Feb 05, 2010 9:48 am)

#21 of 23 Re: diesel or not [nominivan4me] by wopel

Feb 05, 2010 (9:48 am)

Replying to: nominivan4me (Feb 05, 2010 1:28 am)

I have an 2007 R320 and it's gets spectacular fuel mileage for a car it's size. I don't know much about the new diesel engines and what is required with the urea filters, etc. Diesel fuel is running on par with the cost of hightest gas. Diesel's last forever...

#22 of 23 R320 CDI Milage results by jasonwipf

Jun 17, 2010 (12:19 am)

Replying to: pf_flyer (Jun 12, 2006 9:19 am)

After 30-50mi test intervals on a long trip with my R320 CDI diesel here are my results:

55mph = 30.8mpg over 30 miles
60mph = 29.8mpg over 30mi
65mph = 28.2mpg over 30mi
70mph = 26.5mpg over 50mi
75mph = 24.8mpg over 30mi

entire trip was almost 900mi & 13.5hrs with an overall avg. of: 64mph = 28mpg (overall includes 4 bathroom/meal brakes, all other results above were non-stop 30-50mi test intervals)

FYI for comparison purposes I did some test drives before buying this car and with identical test drive routes i got 23.8mpg in a deisel R320 vs. 17mpg with unleaded gas R350. (about 29% better milage with diesel engine, yet in my area diesel is same price as Premium unleaded and diesel was about 10-12% higher than low grade unleaded. And diesels are "supposed" to last about twice as long as their unleaded counterparts. So, still better value eitherway with diesel.

#23 of 23 2008 R350 by kerrye

Oct 17, 2010 (6:55 pm)

Hi guys!
Honest question, Im looking to buy a 2008 R350 or a Buick Enclave. Which do you think is the better buy. Im looking at mechanical, gas, performance and value.

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