spartacvs13

Individual Mode with all Sport and ECO. Consistently see 28-29 mpg on longer highway trips. Pleasantly surprised.

TNS550

Congrats on mileage. I have tracked mpg of the 17,106 miles driven since I bought my 20 GLS via the Fuelly app. My best strictly highway mileage (I'm usually in Comfort mode) has been 26 mpg. Usually get 24 or so. But at a higher average speed that your 59.

jkaetz

We would get better milage if we drove slower. If all goes well our average speed is around 70 for 450 miles. Increasing speed from 60 - 65 to 70+ really starts to suck down fuel. 45 - 55 really is ideal for milage but it's sloooooow.

Scott Schmidt

I recently did a 6400 mile coast-to-coast road trip and averaged 27 mpg. Much of the trip was at 70 or 80 mph on open Interstates out West. Excellent when compared t my old GL 450 which could barely do 21 if memory serves.

spartacvs13

My average speed was probably skewed a bit by a two-lane backwoods highway in Maine with a 30-50mph limit.
I've done other all-highway and seen 27-28mpg. Better than I was expecting so I'll take it.

EWL5

Anyone do the transmission recall and notice a slight reduction in fuel economy (especially in city driving)? The engine subjectively seems smoother but objectively worse via calculating mpg at the pump (trip miles / gallons filled at station).

Splaktar

It's not explicitly stated, but I assume these are v6 mileage numbers?

With the 2024 v8, it's around 15 mpg for me in city driving and 19-21 on the highway.

spartacvs13

Yes, V6.

MB2timer

Anyone see a difference between displayed mileage versus actual mileage using odometer, and tank filling receipt?

EWL5

Yes, the Mercedes reported number for me is normally 1-2 mpg more optimistic than a straight calculation at the pump vs trip mileage.

mdeeds71

That’s a bit low compared to my 2024 63. I’m averaging between a round trip to/from Denver International Airport and Breckenridge around 24-25mpg. Going in down to Denver around 29-31 and back up around 20-21. Typically C or ind tailored modes. If notice the 4cyl derate plus coast/sail mode at play often.

also confirmed numbers with manual calculation post fueling. I like what I see.

nc211

We're nearing 71k miles (70,861), and overall since day one, our average per the app is 23.1 MPG's with an average speed of 28 MPH. We've driven the equivalent of 3 months, 15 days, 15 hours, 36 minutes. We continue to routinely see 28mpg+ on highway cruises.

My 2024 Ford Bronco with the 2.7 twin turbo v6 is averaging 15mpg with less than 400 miles on it by comparison...

wildta

Your Bronco makes me feel better about the MPGs (15.5 in the MB app and my Fuelio app is 15.4 so the MB app is pretty accurate for me) on my GLE 580 but definitely not your 450. Thankfully I only drive around 5k miles each year.

nc211

Yep, price to paid for the ability to go topless. Applies to several areas of life too!