Hugo L.

FInally took delivery of my new-to-me 2014 GLK250.

Set the cruise control for the 1.5 hour ride home from the dealership at a leisurely 64mph, and mileage was 50 mpg (4.7l/100kms, since I live in Canada).

That is something else.

Mmr1

It's rated 24/33, mpg , so you went downhill for 1.5 hrs. It doesn't get 50 mpg on level ground.

formerjeepguy

If that is imperial gallons then it is consistent with my my experiences in a 250.

1.2 us gal ~= 1 imperial gallons.

Hugo L.

Well, it did. It's highway 20 between Drummondville and Québec City. If anyone knows that stretch of road, they know it's straight and flat. I also tried not to accelerate/brake, and was keeping a reasonable distance from traffic (often trucks) in the right lane.

Around town I'm currently doing 8.5l/100 kms (27.6 mpg).

According to my research, many testers got better real-world mileage from that vehicle than the EPA estimates.

The E-class with the same engine was the fuel efficiency king a couple of years ago, so it makes sense.
http://www.roadandtrack.com/car-cult...-a-luxury-car/

Hugo L.

I'm using my iPhone converter, and it is US gallons. In Imperial, it's 60.

This is a picture I took 1h12 into the trip, I had driven 115 kms @ 95 km/h average (59 mph) since I had driven in town from the dealership to the highway, and there were 2 constructions zones (2 miles each, where we had to slow down to 50 mph).

That's with the A/C on.

LesF

My mileage i runs average 29 around town mostly suburban driving and highway runs anywhere between 36-42 highway depending on speed and road conditions according to the car but when calculated it's about 5% less when checked at the pump.

Mmr1

From what I've read, the computer is most likely a bit optimistic on consumption. Try checking it by fill ups and let us know.

107123210

I have had my Canadian GLK250 for 2 1/2 years. In summer on 401 highway between Kingston and Toronto (which is relatively flat) best I get is 6.4L/100km . In winter not so good; usually about 7.1. Have never got below 6.0 in summer.

6.4L/100 = 36.75mpg (US)
7.1L/100 = 33.13mpg

By the way, I gave up keeping fill up fuel consumption records because they were almost same as those on display.

Another by the way - we drive at about 110 to 115kph in Canada. We have insurance provided OBD monitor that encourages us not to speed!

By comparison, our 98 E320 used to get about 32mpg (US) on highway trips.

super7pilot

On a recent trip to Leavenworth Washington (mountainous) from Walla Walla. We went up and down quite a few 4-5% grades and did a lot of single track forest service roads. Over the whole four day trip we averaged 41MPG. I have had a best 46MPG on a round trip from Walla Walla (1000 ASL) to the Tri-cities (550 ASL) with rolling hills in between.

I have checked the pump MPG against the GLK's readout and it was within a 10th or two.

One thing to think about is driving a diesel like one does a petrol will very much effect fuel economy to the negative.

I would average about 25-26 MPG when pulling a car trailer with the Caterham on it.

Hugo L.

Well, that's good to know that the on-board computer is not too far off.

107123210, I do agree that this is not that great. I've had the vehicle for a little under a week now, and since coming home, I've done nothing but stop-go city driving, i.e. my morning and late PM commute, and running a few errands during the weekend. The overall average has yet to get above 7.0l/100 kms. According to the trip computer, my commutes range between 8.1l/100 kms to 10l/100 kms on the way back home, since it's uphill all the way.

I would guess that driving at around 115 km/h on the highway (which is a lot more normal than the snooze-inducing 103ish I cruised at coming backl from the dealership) would affect it somehow, since the vehicle is shaped like a brick.

107123210

I really don't understand why some owners report such high mpg.

The figures I quoted for highway mileage are based on getting on highway, setting cruise control to 115kph and hardly ever touch brakes or pedal for 100s of km.

Driving the GLK is not much like driving other MB diesels (we have owned a few!). Much more gas-car like and sporty. No need to floor pedal just to get her going like the old W123/126s.

super7pilot

What's to not understand? Sounds as if you think we are making up those good MPG results.

More likely low MPG results are down to a lot of city stop & go driving or just plain bad driving habits. Stop & go is not the best venue for a diesel engine in the first place. Diesels do not like to be revved.

That's is why I mentioned that if you drive it like a diesel, It will be much happier and certainly last a lot longer.

107123210

Sounds like this thread is going downhill

super7pilot

No not at all. Just curious to know why you find it odd that people post that they are getting great fuel economy?

Hugo L.

No kidding, isn't that one of the major factors for buying a diesel in the first place?

If I was on the hunt for a diesel SUV (which I was until recently), my research would lead me to forums, where I'd like to have such info.

Unless that's not what he meant by that? I dunno...

107123210

Hugo, the information is here. Real world fuel consumption posted by many owners:

https://mbworld.org/forums/glk-class...l-100km-3.html

Just drive an enjoy. The fuel consumption is quite good, and cost minimal compared with other costs of car ownership! (Like MB's service charges!)

koalatm

No matter how we drive this vehicle, we consistently receive about 6.7 l / 100 km, city, highway, doesn't matter.

That's a lot of full throttle (when I'm driving, not so much when the wife drives) and on the highway we typically do around 130 km/h.

Cwdawson

That is exceptional mileage we have averaged 7.9L/100km over the last 48,500 km. we have kept track since day one and the best we ever got was 6.3L/100km
with that said the absolute worst was still a respectable 10.9 so I'm not complaining....

Hugo L.