GL Class (X164) 2007-2012: GL320CDI, GL420CDI, GL450, GL550

Real World GL550 Mileage

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Old 03-22-2009, 01:56 PM
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2009 GL550
Real World GL550 Mileage

Just drove straight through from Orlando to Houston. 1033 miles, 17.8 avg mpg, 69 avg mph, ~15hrs driving time (all from the onboard computer). I had the cruise set between 80-85mph the whole way, sometimes up to 88-90mph. We stopped at least a dozen times for "potty" breaks (we have a 3 and 5 yr old), food, etc. We also had about 1 hr of sitting in a traffic jams in Orlando, Tallahassee, and Mobile.

I'm pretty happy with the mileage, especially at those speeds. MPG without the stops would likely have been 19-20.

Just thought some out there might want to know.
Old 03-22-2009, 04:47 PM
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GL550
Originally Posted by parkerbj
Just drove straight through from Orlando to Houston. 1033 miles, 17.8 avg mpg, 69 avg mph, ~15hrs driving time (all from the onboard computer). I had the cruise set between 80-85mph the whole way, sometimes up to 88-90mph. We stopped at least a dozen times for "potty" breaks (we have a 3 and 5 yr old), food, etc. We also had about 1 hr of sitting in a traffic jams in Orlando, Tallahassee, and Mobile.

I'm pretty happy with the mileage, especially at those speeds. MPG without the stops would likely have been 19-20.

Just thought some out there might want to know.
Same experience with an 800 pound load and Los Angeles traffic. 1200 mile trip.
Old 03-24-2009, 02:15 PM
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2009 GL550
Are there any 450 comparisons out there? Just curious. Thanks.
Old 03-24-2009, 02:22 PM
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GL450 (Alabaster White/Black Interior)
Originally Posted by parkerbj
Are there any 450 comparisons out there? Just curious. Thanks.
On highway trips I am usually good for around 20 mpg and have gotten as high as 22 mpg. One thing to note is that you are going a lot faster than I am. I usually don't go much over 75 mph.

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