oscaar12

I just traded my 2010 Glk 350 for a 2015 Glk 250 blueteck. I only had 66 k on the 2010 but I do not like the 2016 style so I bought a new 2015. I am getting , no bull !!! at 300 klms 5.8 and have flirted with 5,6 on a trip from Brighton to Barrie and back at 115 kilos per hour. 5.8 is 47,8 miles per Canadian gallon better than the POS Passant I bought in 2005 .It only got 40 miles per.

formerjeepguy

Are you saying 47.8 mpg with the 5 quart imperial gallon? that is about 38.25 mpg US gallons.

I have about 26 miles to work which is mostly highway. If I keep it at or below 65 mph and avoid braking, speed changes, I consistantly get 40.2 mpg. There is more traffic on the way home so I usuually get arounf 33 mpg on the return trip.

I love this diesel.

oscaar12

Yes , I did it both ways.The miles per gallon on the read out is in US gallons.
The drive I did yesterday is the same as I did 2 weeks ago in my 2010 gasser and it was $70 .I just filled my car up and it was $33.50 with the fuel about the same price as last week. The proof is in the wallet!

107123210

Just for the record

- One Imperial gallon, is 4.8038 US qts.

- 5.8L/100km is 40.55 US mpg or 48.7 Imp mpg.

Our 2014 GLK250 has never got mileage like Oscaar is quoting. Best for any distance, with car unloaded and no roof top carrier is about 36mpg (US). We drove from Kingston to Ottawa and back recently and that is about what we got. In the winter, 32mpg (US) is more normal. We don't drive fast, but just match traffic speed. Maybe 70-75 mph (113-120kph) on highway.

oscaar12

I am not kidding about the fuel economy. If I can fiqure how to do it I will post a picture of the reading. My dealer's service and parts managers are only getting 6.4 on their Glk 250's I got 6.0 on the way home from the dealer in Peterbough to Brighton at 85 klms per hour with 97 klms on it. Maybe I got a good one. I had 2 VW Passants 95 and a POS 05 and the 96 was 48 mpg no matter the speed and the other was 40 ??? I am an easy driver , I once got 275,000 klms from front brakes on the 96 with mostly Hwy miles and a 6 speed tranny.On a trip in the 96 Passant with 91 liters in the tank I went 1700 klms.It was a wagon.My son went from Caledon Ontario to Moncton NB on a tank in the 96.After the POS 05 Passant I swore NEVER to buy a VW again , what a piece of crap. A HUGE money pit , and when it got cold it would not start.

Alex Bel

Yesterday's trip from Detroit to Boston, 825 miles, 38mpg by the computer on our 2014 GLK 250.

107123210

At 85 kph (52.8mph) 6.0 L/100km. But at 115kph (71.4 mph), your economy was better at 5.6 L/100?

You would think mileage at the lower speed would be better.

We are happy if we get better than 7L/100. And in summer we sometimes do, but best is about 6.6. That is at speed of traffic on 401 and/or 416 (~120kph, 74.6mph)

I am a bit disappointed with our GLK250's mileage. To point that I have given up checking actual mileage based on fillups.

oscaar12

It gets better as it get more miles on it I guess. There were a few stop lights on the way home also. We are getting 7.8 on a long trip 600 klms on an 09 C300 at 115klms which is a car we just bought with 106klms on it

Diabolis

The best gas mileage is at the lowest speed / engine rpms in 7th gear - I believe a little over 90 km/h. On a recent trip on country roads we managed to average 5.6 L/100 km over a 240 km round trip with the cruise set at ~95 km/h, and that included several pedal-to-the-floor passes and about a dozen traffic lights and stop signs each.

107123210 - at 85 km/h the GLK 250 is likely still in 6th and revving around 1900 rpm instead of below 1500 (lowest revs in 7th gear, where on level ground it shifts somewhere just above 90 km/h).

If you're really disappoined with the mileage of the GLK 250, I am afraid you have extrememly unrealistic expectations. It's an SUV that weighs 4,500 lbs with no load and has the aerodynamic efficiency of a parachute and still puts out 200 hp and 370 ft lb. A 2012 Prius v hybrid can only manage 5.9 L/100 km on the highway. If there's ONE thing that's completely beyond reproach on the GLK 250, it's the fuel efficiency.

Now, if you can't get below 7 L/100 km, there's probably something not quite right with your car assuming that you're not redlining it the entire time. What tire pressures are you running? IIRC, you need to be above 42 psi front and rear. If you're only running 32 psi for example, that would certainly account for the difference (in addition to being unsafe for the GLK).

On the C63, I am happy when I manage to average below 25 L/100 km...

107123210

I am only disappointed with the mileage we get compared with the claims I see on this forum.

Our car gets driven mostly in southern USA during winter. For a mix of 25/75 city/highway we get 32 mpg day in and day out. Fully loaded on way down and back, we get less than that for 100% highway. Unloaded during summer on highway, we can get 36mpg (6.6L/100). We are senior drivers and just match traffic speed which is usually in 115-120 kph (or about 70mph in USA.

Others here claim over 40mpg driving at 90mph! or like Oscaar, 5.6L/100 (42mpg) at 115kph on a car that is not yet even broken in.

What does the filler cap say on a Canadian GLK250 with standard all weather tires? (My wife has GLK today, so I can't check, but will)

oscaar12

The pressures are 35 front 39 rear for the standard all seasons

Diabolis

On the 19s or 20s? And, there's a always a range - are those the minimums or maximums? Can someone snap a pic of the label on the fuel filler door AND the drivers' door jamb (my wife is out with ours)?

oscaar12

20's

107123210

On my 2014 with standard 19" wheels, the design pressures for normal load are 33/33. For fully loaded they are 35/42. And +4psi when hot.

Dealer set pressures at last service. I should double check them before we do another road trip.

dzl_benz

Here you go.

Diabolis

Thank you. So yeah, if you have 20" wheels, you live in North America and you check your tire pressures at the gas station at this time of year after driving for more than a couple of minutes, assuming that you may occasionaly want to carry groceries or three passengers in your GLK, the warm pressures should be around 41 psi front and 46 psi rear. Anything lower than that increases your rolling resistance and decreases the fuel mileage.

107123210

But for the standard 19" rims with the standard Continental all-season tires we get in Canada, the recommended pressures are as I posted above.

33/33 for normal unloaded use. 35/42 for full load. And +4 when hot. I set mine at home with my own compressor and a good gauge. Don't trust those gas station gauges.

Surprised they use psig on our Canadian cars. I think we went metric many years ago - even my 85 300D has both psi and bar.

Depending on where you are in NA, that + 4psig could vary. It's been frigging cold here lately!

Diabolis

Right. So - if you have 19s and you check at the gas station (by which time your tires are already warm if you drive there for more than 2-3 minutes - heat comes from the sidewall flexing) and you take the "middle" ground, you'd need 38 psi in the front and 42 psi rear. And, it's always better and safer to slightly over-inflate than to under-inflate.

107123210

Why would I drive to gas station to check my tire pressures?

I would think it is best to follow manufacturer's pressure figures as posted on filler cap. For us that is 33/33 in Summer (when GLK is seldom used) and 35/42 when we head South fully loaded. This done at home using a high quality pressure gauge and our own compressor before we drive.

Handling is seriously affected by incorrect tire pressure. With over-pressure and light loading, you are less safe because there is less rubber on the road. Tires also wear unevenly.

This short article summarizes it well:
http://krexinc.com/2012/03/27/why-ti...ssure-matters/

Only part I disagree with, is only checking tires when you vacuum your car! Some of my cars would never get checked that way

Anyway we are

Diabolis

Actually - I think we are both agreeing that the manufacturers' pressure specs is what you should be running. It's just that while you and I may have air compressosrs at home, the average GLK owner likely doesn't and they check their tire pressures at the gas pump (if they ever do in the first place).

Just for the record though, while it would provide somewhat less traction, a *slightly* over-inflated tire is safer than a slighly under-inflated tire for a number of reasons, and furthermore tires lose air over time so if you put a COUPLE of extra psi per tire you're not either sacrificing nor damagin anything. You remember the whole Ford Explorer & Firestone saga a few years ago, don't you?