I have one of those too!
Gl350 gas milege
Junior Member
Joined: Feb 2013
Posts: 66
Likes: 0
BMW M5
Cruise Control
Just completed another trip from NYC are to Albany, NY area. on the way up there was traffic so I did not use cruise control, just went with the flow. I got 28.7 mpg over about 100 miles and I was not even trying to drive conservatively. On the way home the roads were empty I set the cruise control at 67 so not to attract unneeded attention. The truck on got 26.7.
Lots of evevation changes on this particular throughway.
Thats two trip where I played with the CC and lost mpg with it activated. has anyone else had similar experience?
I will also mention that I love the way the truck auomatically downshift to engine brake on steep ascents. Almost don't need to touch brakes.
Lots of evevation changes on this particular throughway.
Thats two trip where I played with the CC and lost mpg with it activated. has anyone else had similar experience?
I will also mention that I love the way the truck auomatically downshift to engine brake on steep ascents. Almost don't need to touch brakes.
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
Just so you guys can compare...... I've been getting around 22 on my 400 mile runs to New England and 16 on the around town runs.....not bad for my big ole V8 and better than I got on my previous two 450's.
MBWorld Fanatic!
Joined: Jun 2007
Posts: 1,936
Likes: 350
From: Huntington NY
S560
I regularly get 28-28.6 on NY upstate highways (quite hilly). Around town on Long Island I average 22mpg. My wife around town averages 16, but she considers the gas pedal an on/off switch....
MBWorld Fanatic!
Joined: Jun 2007
Posts: 1,936
Likes: 350
From: Huntington NY
S560
True story- We had a 2010 Escalade ESV before the GL. One day my wife asked me why the yellow light comes on in the dash when she leaves a light/stop sign. I told her it was the traction control! Yep, she was spinning the tires on a 7000lb AWD SUV with regularity!! 
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Junior Member
Joined: May 2014
Posts: 29
Likes: 0
lexus LS430
just got back from 3200 mile trip and i found out quick that the onboard MPG isnt accurate........i drove 75-85 and the best i got with some mixed driving was 23.7......most of the tanks were 22. thats using refill amounts and miles driven and not the fancy readout that isnt right.
Junior Member
Joined: Sep 2013
Posts: 57
Likes: 6
GL 350
I was going to comment on this earlier. The onboard computer Mercedes uses is more accurate than some others, but the only accurate way to check mileage is to fill the vehicle up each time, and divide the miles driven between fill ups by the quantity of fuel used. This is the basis for the figures I report. I've found the Mercedes computer reads 10 to 20% high.
MBWorld Fanatic!
Joined: Jun 2007
Posts: 1,936
Likes: 350
From: Huntington NY
S560
I was going to comment on this earlier. The onboard computer Mercedes uses is more accurate than some others, but the only accurate way to check mileage is to fill the vehicle up each time, and divide the miles driven between fill ups by the quantity of fuel used. This is the basis for the figures I report. I've found the Mercedes computer reads 10 to 20% high.
Junior Member
Joined: Sep 2013
Posts: 57
Likes: 6
GL 350
Yes--10% seems to be about average--if it reads 29, the actual is 26 or so. It's a lot better than the computer I have on a Jeep Liberty diesel, when it says 30, the actual is probably 24 or so, if not worse. Actually, with the Mercedes, after thinking about it, I would say 5% to 10% is probably typical. I'll start recording it so I will have actual numbers.
Newbie
Joined: Apr 2015
Posts: 3
Likes: 0
2012 passat
Our first few months experience has been great - we got over 1200 km per tank (over several tanks) before the indicator went on in one long haul to the US and back - and, one ethereal day's drive in the Canadian Rockies we drove a full day with the eco calculator giving us 6.5 l/100 km! wow. must have been the altitude, relative humidity or something - but, that was one spectacular day.Now at 12,500 on the clock, we're getting a solid 8.4 on average and 10.2 around town.
1200km seems a lot! Are you driving a pre-2012 model or post-2013 model?
I heard the fuel warning light comes earlier in 2nd gen (2013 onward) cars then 1st gen. That's say when the fuel warning light comes on in a 2nd gen model, you can hardly put more than 23 gallons in it. But in the first gen car, you may sqeeze some 25 gallons in. I'm not sure if this is true though.
Junior Member
Joined: Jan 2013
Posts: 16
Likes: 0
From: Canmore, Alberta
GL 350
I suppose that its technically fuel used per distance traveled ..
We have a May 2014 production model. That said, we don't live in gallons up here so its a bit difficult for me to convert easily anymore. I used to be bilingual (Metric and US) but I have to admit that I do not really understand the US system any more. When we drive to the US I even have to set the control panel in the car to US so I can at least match the speed limits but the GPS is left running in Metric so that I know how far I have to go before the turns. Its an odd bipolarity.
So, I don't really know how large the tank is, or if the diesel in our part of the world has a little different formulation or if its an altitude thing. When we're in the mountains, which is relatively frequently of late, fuel economy improves noticeably. If you keep the speed at 100 and there isn't any wind its pretty amazingly efficient.
So, I don't really know how large the tank is, or if the diesel in our part of the world has a little different formulation or if its an altitude thing. When we're in the mountains, which is relatively frequently of late, fuel economy improves noticeably. If you keep the speed at 100 and there isn't any wind its pretty amazingly efficient.
1200km seems a lot! Are you driving a pre-2012 model or post-2013 model?
I heard the fuel warning light comes earlier in 2nd gen (2013 onward) cars then 1st gen. That's say when the fuel warning light comes on in a 2nd gen model, you can hardly put more than 23 gallons in it. But in the first gen car, you may sqeeze some 25 gallons in. I'm not sure if this is true though.
I heard the fuel warning light comes earlier in 2nd gen (2013 onward) cars then 1st gen. That's say when the fuel warning light comes on in a 2nd gen model, you can hardly put more than 23 gallons in it. But in the first gen car, you may sqeeze some 25 gallons in. I'm not sure if this is true though.
Newbie
Joined: Apr 2015
Posts: 3
Likes: 0
2012 passat
We have a May 2014 production model. That said, we don't live in gallons up here so its a bit difficult for me to convert easily anymore. I used to be bilingual (Metric and US) but I have to admit that I do not really understand the US system any more. When we drive to the US I even have to set the control panel in the car to US so I can at least match the speed limits but the GPS is left running in Metric so that I know how far I have to go before the turns. Its an odd bipolarity.
So, I don't really know how large the tank is, or if the diesel in our part of the world has a little different formulation or if its an altitude thing. When we're in the mountains, which is relatively frequently of late, fuel economy improves noticeably. If you keep the speed at 100 and there isn't any wind its pretty amazingly efficient.
So, I don't really know how large the tank is, or if the diesel in our part of the world has a little different formulation or if its an altitude thing. When we're in the mountains, which is relatively frequently of late, fuel economy improves noticeably. If you keep the speed at 100 and there isn't any wind its pretty amazingly efficient.
So may I ask you after you drive 1200+ kms, how many liters of diesel do you pump into the tank? do you refuel before the light come on or right after the light come on or wait until it's dead empty?
Junior Member
Joined: Jan 2013
Posts: 16
Likes: 0
From: Canmore, Alberta
GL 350
More on distance traveled
Lol I'm also from Canada (Toronto), so I use metric for most of the time. But I don't own a GL350 now, so most of my information ofGL350 comes from this forum and everyone post their tank capacity and fuel consumption in imperial so I just to lazy to convert them to metric lol.
So may I ask you after you drive 1200+ kms, how many liters of diesel do you pump into the tank? do you refuel before the light come on or right after the light come on or wait until it's dead empty?
So may I ask you after you drive 1200+ kms, how many liters of diesel do you pump into the tank? do you refuel before the light come on or right after the light come on or wait until it's dead empty?
Junior Member
Joined: Jan 2013
Posts: 16
Likes: 0
From: Canmore, Alberta
GL 350
Fuel economy update
OK. I just returned from a 6182 km journey to the US mid-West. Fuel economy overall was 7.9 l/100 km. The load was moderate, prevailing Westerlies on the way out - lots of local running about whilst there - and, the most nasty, twisty headwinds possible for 2 full days on the way back.
All of the fueling stations throughout ND, MN, IL and IN had a sticker on the pump that said that the fuel had between 5% to 20% biodiesel, but all were labeled ULSD. I am not sure what exactly this means relative to the fuel quality discussions that have been taking place.
I did not test the reserve light function on this trip b/c I did not know where the next station might be. I'll get after that on our next trip towards the mountains which will be likely before the end of June. On a local fill, I let the light pop off before filling and put in 101.3 l.
We'll see where the next bit gets us.
All of the fueling stations throughout ND, MN, IL and IN had a sticker on the pump that said that the fuel had between 5% to 20% biodiesel, but all were labeled ULSD. I am not sure what exactly this means relative to the fuel quality discussions that have been taking place.
I did not test the reserve light function on this trip b/c I did not know where the next station might be. I'll get after that on our next trip towards the mountains which will be likely before the end of June. On a local fill, I let the light pop off before filling and put in 101.3 l.
We'll see where the next bit gets us.
MBWorld Fanatic!
Joined: Nov 2007
Posts: 1,425
Likes: 2
From: Minnesota
2015 Ram 2500, former 2013 GL350, 2007 GL450
All of the fueling stations throughout ND, MN, IL and IN had a sticker on the pump that said that the fuel had between 5% to 20% biodiesel, but all were labeled ULSD. I am not sure what exactly this means relative to the fuel quality discussions that have been taking place.
Newbie
Joined: Apr 2015
Posts: 3
Likes: 0
2012 passat
OK. I just returned from a 6182 km journey to the US mid-West. Fuel economy overall was 7.9 l/100 km. The load was moderate, prevailing Westerlies on the way out - lots of local running about whilst there - and, the most nasty, twisty headwinds possible for 2 full days on the way back.
All of the fueling stations throughout ND, MN, IL and IN had a sticker on the pump that said that the fuel had between 5% to 20% biodiesel, but all were labeled ULSD. I am not sure what exactly this means relative to the fuel quality discussions that have been taking place.
I did not test the reserve light function on this trip b/c I did not know where the next station might be. I'll get after that on our next trip towards the mountains which will be likely before the end of June. On a local fill, I let the light pop off before filling and put in 101.3 l.
We'll see where the next bit gets us.
All of the fueling stations throughout ND, MN, IL and IN had a sticker on the pump that said that the fuel had between 5% to 20% biodiesel, but all were labeled ULSD. I am not sure what exactly this means relative to the fuel quality discussions that have been taking place.
I did not test the reserve light function on this trip b/c I did not know where the next station might be. I'll get after that on our next trip towards the mountains which will be likely before the end of June. On a local fill, I let the light pop off before filling and put in 101.3 l.
We'll see where the next bit gets us.
Super Member
Joined: Jul 2009
Posts: 814
Likes: 9
15 GL550
Lol I'm also from Canada (Toronto), so I use metric for most of the time. But I don't own a GL350 now, so most of my information ofGL350 comes from this forum and everyone post their tank capacity and fuel consumption in imperial so I just to lazy to convert them to metric lol.
So may I ask you after you drive 1200+ kms, how many liters of diesel do you pump into the tank? do you refuel before the light come on or right after the light come on or wait until it's dead empty?
So may I ask you after you drive 1200+ kms, how many liters of diesel do you pump into the tank? do you refuel before the light come on or right after the light come on or wait until it's dead empty?
