Gl550 Mpg
Thread Starter
MBWorld Fanatic!
Joined: Aug 2003
Posts: 5,517
Likes: 20
From: Las Vegas, NV
2011 E350 Cabriolet..White and Almond Mocha
Gl550 Mpg
I just noticed in one of Steve's pics the EPA figures for the GL550. 13 City, 17 Hwy...
Looks like the new one is a pretty thirsty animal...
Looks like the new one is a pretty thirsty animal...
Senior Member
Joined: Apr 2004
Posts: 254
Likes: 4
From: N. Illinois, USA
2021 GLS450, 2015 E250BT 4Matic, 2007 GL320CDI, 2005 SLK350, 2001 SLK320
It would be interesting to compare the 2008 GL550 rated mpg against the 2008 GL450 rated mpg. For 2007, the 450 was 14/18 or 15/19 (can't remember which). For 2008, those should be reduced by 1-2 mpg, since all cars use the new mpg formula. If the 450 ends up around 13/17 for 2008, then the 550 at 13/17 isn't bad at all by comparison. I was expecting much worse.
Thread Starter
MBWorld Fanatic!
Joined: Aug 2003
Posts: 5,517
Likes: 20
From: Las Vegas, NV
2011 E350 Cabriolet..White and Almond Mocha
It would be interesting to compare the 2008 GL550 rated mpg against the 2008 GL450 rated mpg. For 2007, the 450 was 14/18 or 15/19 (can't remember which). For 2008, those should be reduced by 1-2 mpg, since all cars use the new mpg formula. If the 450 ends up around 13/17 for 2008, then the 550 at 13/17 isn't bad at all by comparison. I was expecting much worse.
MBWorld Fanatic!
Joined: May 2007
Posts: 2,244
Likes: 1
From: Scottsdale, AZ
2004 RX330, 2008 Scion xB, 2001 Honda Insight Hybrid, 2010 Toyot Prius v ATP
MBWorld Fanatic!
Joined: May 2007
Posts: 2,244
Likes: 1
From: Scottsdale, AZ
2004 RX330, 2008 Scion xB, 2001 Honda Insight Hybrid, 2010 Toyot Prius v ATP
Trending Topics
Senior Member
Joined: Oct 2005
Posts: 352
Likes: 1
From: fl
1992 500E, 2006 E500, 2007 GL 450
My quess in that overall mpg will be almost identical to the 4.6 liter. I get about 17 overall in 30% local 70% highway driving-rare bumper to bumper trafic.
What kind of mpg did you get on your S550?
What kind of mpg did you get on your S550?
MB World Stories
The Best of Mercedes & AMG
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
Thread Starter
MBWorld Fanatic!
Joined: Aug 2003
Posts: 5,517
Likes: 20
From: Las Vegas, NV
2011 E350 Cabriolet..White and Almond Mocha
I get about 15/16 or so mostly city driving but on the highway it is fantastic for such a big car. Average about 25mpg at interstate speeds on long trips.
Senior Member
Joined: Oct 2005
Posts: 352
Likes: 1
From: fl
1992 500E, 2006 E500, 2007 GL 450
I quess it has a lot to do with aerodynamics. The computer on my GL indicates about 22 mpg at a steady 70mph but it drops to 18 at a steady 85mph. I have seen 25mpg on the computer at a steady 45 on a rural road. My E500 hardly varies between 70 and 85mph.
Senior Member
Joined: Mar 2007
Posts: 379
Likes: 0
From: MA
13 SL550, 14 E63 Wagon, 15 S550, 11 M3, 08 F430 Spider, 12 ML350
Yes definitely aerodynamics and the horsepower to weight ratio is much higher on the E so it doesn't work so hard at speed. I think the GL must be 1500 lbs heavier and 50 hp less.
MBWorld Fanatic!
Joined: May 2007
Posts: 2,244
Likes: 1
From: Scottsdale, AZ
2004 RX330, 2008 Scion xB, 2001 Honda Insight Hybrid, 2010 Toyot Prius v ATP
I think.
Senior Member
Joined: Mar 2007
Posts: 379
Likes: 0
From: MA
13 SL550, 14 E63 Wagon, 15 S550, 11 M3, 08 F430 Spider, 12 ML350
Which brings back up my position that the higher horsepower and torque of the GL 420CDI (or better yet Bluetec) should translate into higher MPG numbers on the highway. Right? Increase the HP/Weight ratio (actually decrease it by increasing HP) and the engine works less to move the same mass over the same route, translating into more efficiency.
I think.
I think.
Yeah but it all depends how the extra hp is achieved. The same drive train in a lighter car would get better mileage but add more hp by jamming more fuel into a higher compression engine in the same vehicle and it might be less efficient. It's really about energy in vs energy out. Get's complex real fast.
Senior Member
Joined: Oct 2005
Posts: 352
Likes: 1
From: fl
1992 500E, 2006 E500, 2007 GL 450
Venturing into an area I know next to nothing about, I thought that HP/Weight ratios impacted efficiency most during acceleration and that at a steady speed weight had little impact on mpg beyond any slight difference in internal engine friction caused by different gearing and any variability in rolling resistance.
Member
Joined: Feb 2007
Posts: 196
Likes: 0
From: Bucks County PA
MB
Venturing into an area I know next to nothing about, I thought that HP/Weight ratios impacted efficiency most during acceleration and that at a steady speed weight had little impact on mpg beyond any slight difference in internal engine friction caused by different gearing and any variability in rolling resistance.
MBWorld Fanatic!
Joined: May 2007
Posts: 2,244
Likes: 1
From: Scottsdale, AZ
2004 RX330, 2008 Scion xB, 2001 Honda Insight Hybrid, 2010 Toyot Prius v ATP
Senior Member
Joined: Mar 2007
Posts: 379
Likes: 0
From: MA
13 SL550, 14 E63 Wagon, 15 S550, 11 M3, 08 F430 Spider, 12 ML350
Venturing into an area I know next to nothing about, I thought that HP/Weight ratios impacted efficiency most during acceleration and that at a steady speed weight had little impact on mpg beyond any slight difference in internal engine friction caused by different gearing and any variability in rolling resistance.
Senior Member
Joined: Jul 2007
Posts: 456
Likes: 3
From: East Coast
19 MB G63, '18 RR Dawn, '15 RR ATB LWB, '14/'08 MB GL550, '11 MB CL63 AMG, '11 X5 50i etc etc
MBWorld Fanatic!
Joined: Mar 2007
Posts: 1,653
Likes: 7
From: Central Pa.
2013 GL450 (traded for 2015 Escalade), 2012 Corvette, 2014 Ford Fusion, Previous: 2007 GL450, 2011
.....and, none of us bought these vehicles because we were worried about the mileage That being said...........I have been greatly impressed with my 450 mileage..........I do a 450 mile trip every month and have been regularly getting 19.5 or 20.5 on that trip. Pretty darn good for a vehicle with AWD and of that size, weight, etc.!
That being said...........I have been greatly impressed with my 450 mileage..........I do a 450 mile trip every month and have been regularly getting 19.5 or 20.5 on that trip. Pretty darn good for a vehicle with AWD and of that size, weight, etc.!
Newbie
Joined: Jul 2007
Posts: 10
Likes: 0
05 Cayenne (sold) - 07 328 coupe (selling) - 07 GL450 BlackOnBlack
I've just empty out my very first tank through a combination of 70% city and 30% highway driving, rack up 350 miles or ~14 MPG. That's not bad at all, however the major shocker is that the first refill was exactly $75.00, not a penny more or less
Junior Member
Joined: Jun 2006
Posts: 64
Likes: 0
From: Walnut Creek, CA
2022 GLE 350; 2016 BMW 428i gran coupe; 2014 Audi Q5 tdi
MBWorld Fanatic!
Joined: Feb 2007
Posts: 2,548
Likes: 3
From: LA LA Land
'07 GL 450, '02 S 80 T6
Originally Posted by abcdef
Amazing . . . I also had a recent fill-up $75.00 (not a penny more or less). Perhaps it has something to do with the credit card fraud limits they are using at gas stations these days
Super Member
Joined: Apr 2007
Posts: 800
Likes: 1
From: Southern California
2014 GL 450
Shell seems to be the one chain that always does this. Ticks me off. I had an Expedition and $75 didn't come close to filling that barge. They used to shut it off at $50 which made me want to strangle somebody.
Newbie
Joined: Jul 2007
Posts: 10
Likes: 0
05 Cayenne (sold) - 07 328 coupe (selling) - 07 GL450 BlackOnBlack
MBWorld Fanatic!
Joined: Feb 2007
Posts: 2,548
Likes: 3
From: LA LA Land
'07 GL 450, '02 S 80 T6
Originally Posted by Newbie_2_MB
Shell seems to be the one chain that always does this. Ticks me off.
