Mileage-GLB 250 4Matic
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Newbie
Joined: Oct 2022
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GLB 250 4 MATIC 2022
Mileage-GLB 250 4Matic
Folks, I am seeing about ~28-30 in the city with avg speed of ~35 while on the highway, I am only getting ~26 MPG with avg speed of 55-60. I recently drove about 500-1000 miles and on a cruise control, gears are constantly switching between 7 and 8 and that is eating up MPG. I went to MB dealer and they are saying it is perfectly normal and no issues. However, on a cruise control... mostly emtpy road, why is the gear switching between 7 and 8? Why I am getting only 26 MPG?
Anyone else has this situation?
Anyone else has this situation?
Junior Member
Joined: Aug 2022
Posts: 22
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From: SW lower MI
2021 GLB250
Folks, I am seeing about ~28-30 in the city with avg speed of ~35 while on the highway, I am only getting ~26 MPG with avg speed of 55-60. I recently drove about 500-1000 miles and on a cruise control, gears are constantly switching between 7 and 8 and that is eating up MPG.
Super Member
Joined: Jan 2021
Posts: 557
Likes: 204
2021 Mercedes GLB250 4Matic
I am getting 25mpg with mixed driving. When driving to work very early in the morning, I average between 30 to 36 mpg (depending on the season) per commute. However coming back (crawling in NYC traffic) I get 20 to 25 mpg. 2 Years overall average is 25mpg. As a comparison driving same route with 1.5L Turbo C-RV I get around 27 mpg on average vs 25 mpg GLB, however I get better highway averages with GLB (up to 36mpg vs 34mpg on C-RV per highway trip).
P.S. Season and how you drive does make a difference on MPG. I always get better MPG in Spring and Fall, vs Winter and Summer when either Heat or AC is blasting. Driving in "Sport Mode" will reduce your MPG as well.
P.S. Season and how you drive does make a difference on MPG. I always get better MPG in Spring and Fall, vs Winter and Summer when either Heat or AC is blasting. Driving in "Sport Mode" will reduce your MPG as well.
Last edited by Vladimir Livson; Dec 16, 2022 at 07:38 AM.
Newbie
Joined: Nov 2021
Posts: 6
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From: Scottsdale, AZ
2021 E450 Cab/2022 GLB250
I am averaging about 25 for city driving and closer to 35 for highway driving, especially when driving on level highways. Overall so far since we received ours we are averaging 29.8 mpg overall after driving about 16k miles. We had one leg of a trip where we reached 39 mpg on a highway.
Junior Member
Joined: Apr 2022
Posts: 54
Likes: 4
From: Atlanta
2022 GLB 250 4matic
Folks, I am seeing about ~28-30 in the city with avg speed of ~35 while on the highway, I am only getting ~26 MPG with avg speed of 55-60. I recently drove about 500-1000 miles and on a cruise control, gears are constantly switching between 7 and 8 and that is eating up MPG. I went to MB dealer and they are saying it is perfectly normal and no issues. However, on a cruise control... mostly emtpy road, why is the gear switching between 7 and 8? Why I am getting only 26 MPG?
Anyone else has this situation?
Anyone else has this situation?
Newbie
Joined: Nov 2022
Posts: 9
Likes: 2
GLA 250
ECO vs COMFORT mode
Hello, I am a new owner of a pre-certified 2022 GLB FWD. I tried ECO mode but didn't find that it gave me better MPG vs. Comfort mode. It seemed ECO mode was holding D7 longer on the highway vs. COMFORT. What do others think about ECO mode? What does it do to improve MPG? Thanks.
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MBWorld Fanatic!
Joined: Sep 2013
Posts: 2,349
Likes: 696
2021 GLB250 FWD, 2023 GLA250 FWD, 2013 C250, 2015 GLK350, 2005 ML350SE, 2003 E320
My 2-bits:
We do mixed suburban-highway driving. We pay more attention to miles/tankful than mpg. We’re getting 450-480 in comfort mode. That’s around 28-30 mpg in a FWD model. A 4matic is heavier and has more drivetrain load, so I would expect 1-2 mpg less (420-460/tankful). In our driving eco doesn’t seem to make any difference on the GLB. It might help if there’s a lot of city driving.
We do mixed suburban-highway driving. We pay more attention to miles/tankful than mpg. We’re getting 450-480 in comfort mode. That’s around 28-30 mpg in a FWD model. A 4matic is heavier and has more drivetrain load, so I would expect 1-2 mpg less (420-460/tankful). In our driving eco doesn’t seem to make any difference on the GLB. It might help if there’s a lot of city driving.
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Junior Member
Joined: Apr 2022
Posts: 54
Likes: 4
From: Atlanta
2022 GLB 250 4matic
I wish I was getting anywhere near those numbers. My morning drive consists of 25 and 35 mph roads, no extended periods at a constant speed, and I get an actual 19, yes 19 mpg. I never remote start or let car “warm up”, always have auto stop on, and usually I am only occupant. On the highway here if you aren’t doing at least 80 you are a road hazard and so I get about 25 on the highway. Mileage sucks, very disappointed. My 911 gets better mileage. My commute is the ideal commute for an EV, after driving my mother’s Volvo XC40 Electric, I am seriously considering trading in for one.
Newbie
Joined: Nov 2022
Posts: 9
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GLA 250
ECO mode for stop and go traffic
Recently I have been driving in ECO mode when in stop and go traffic.
I'm not sure if it helps fuel economy, however to me it seems to be reducing the jerkiness of the DCT when starting out and stopping.
I think it is because ECO mode usually starts off in D2 (vs D1 for Comfort).
Any thoughts on this?
I'm not sure if it helps fuel economy, however to me it seems to be reducing the jerkiness of the DCT when starting out and stopping.
I think it is because ECO mode usually starts off in D2 (vs D1 for Comfort).
Any thoughts on this?
MBWorld Fanatic!
Joined: Sep 2013
Posts: 2,349
Likes: 696
2021 GLB250 FWD, 2023 GLA250 FWD, 2013 C250, 2015 GLK350, 2005 ML350SE, 2003 E320
The harsh 1-2 upshift has been mentioned in other threads. When my 2021 GLB250 was in for other service they applied a transmission software update that made 1->2 much smoother.
Member
Joined: Mar 2014
Posts: 203
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GLK350
Newbie
Joined: Feb 2023
Posts: 6
Likes: 0
2023 GLB 250
Recently I have been driving in ECO mode when in stop and go traffic.
I'm not sure if it helps fuel economy, however to me it seems to be reducing the jerkiness of the DCT when starting out and stopping.
I think it is because ECO mode usually starts off in D2 (vs D1 for Comfort).
Any thoughts on this?
I'm not sure if it helps fuel economy, however to me it seems to be reducing the jerkiness of the DCT when starting out and stopping.
I think it is because ECO mode usually starts off in D2 (vs D1 for Comfort).
Any thoughts on this?
Newbie
Joined: Feb 2023
Posts: 6
Likes: 0
2023 GLB 250
No you have to manually turn it off by pressing it under the start button. It means If you've selected ECO mode, when running on two cylinders you'll see the current gear (e.g D6,D7) symbol change to a green D. This would typically occur when coasting downhill.
Super Member
Joined: Jan 2021
Posts: 557
Likes: 204
2021 Mercedes GLB250 4Matic
Sometimes the car will temporary turn Auto Stop off (the Auto Stop will turn yellow). Typically when the car just started and it's cold out, or driving in heavy traffic and car cycled through Auto Stop on/off too many times.
Junior Member
Joined: Apr 2022
Posts: 54
Likes: 4
From: Atlanta
2022 GLB 250 4matic
To come back to this after owning my GLB a couple years. My MPG is through the roof and usually hits 28 mpg per tank around town. You need to master the glide mode after you are familiar with your transmission, I recommend setting up individual setting as all comfort/standard settings except the engine and change that to eco. This means it will behave as comfort mode with the exception of letting the engine engage glide mode. I constantly switch drive modes while driving to anticipate being able to engage glide mode. This is by far the secret to MPGs through the roof. I drive in sport and pass everybody, but I switch to my individual or eco mode to engage glide after up to speed. You will need adequate distance between you and traffic or it will keep it in regular gear. But I've found I can instantly trigger glide mode by gently accelerating for half a second then taking foot off gas as long as not following too close to anybody. I've asked both my mechanic and the dealership about me constantly switching drive modes and they basically told me if you can do it, it should be fine. This is the greatest advantage of the GLB over the GLC and in even GLE in my opinion and a huge plus because this is not a feature in other "lesser" MB models. I was lucky enough to get the full self driving cruise control, self parking, etc. during the pandemic so I'm not sure what the Distronic light packages usually available offer so I'm assuming we all have this glide mode. Way beyond shifting myself, mastering this mode has boosted my milage and let's me feel like I'm a pilot playing with my switches the entire time I drive 
