a tale of two sixes....
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From: Milton/Westport, MA USA
me: 2015 SL400 & 2015 ML400; wife: 2022 GLC Coupe; daughter: 2017 GLC SUV
a tale of two sixes....
I have the 3.5l six in both cars. we just took the E350 away on vacation, and on the way back, 60 traffic-free highway miles, I think I got about 23 MPG. I just took my CLK350 down to the cape, a round trip of mostly traffic-free highway driving and got 29.6 MPG over 140 miles, and I was seeing 30.0 before hitting the little bit of traffic, then the standstill that is my home town. Same engine, very different economy.
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From: Irvine, CA
2008 E550, 2012 GL450, 2014 GLK350, 2015 S550, 2020 GLC350e
If those were truly highway miles, that is very low.
I've done quite a bit of highway only driving in my 08 E550 and I can hit 27mpg avging around 65mph.
I've done quite a bit of highway only driving in my 08 E550 and I can hit 27mpg avging around 65mph.
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From: VA
95 E300D, 97 FZJ-80
I have the 3.5l six in both cars. we just took the E350 away on vacation, and on the way back, 60 traffic-free highway miles, I think I got about 23 MPG. I just took my CLK350 down to the cape, a round trip of mostly traffic-free highway driving and got 29.6 MPG over 140 miles, and I was seeing 30.0 before hitting the little bit of traffic, then the standstill that is my home town. Same engine, very different economy.
Thread Starter
MBWorld Fanatic!
Joined: Feb 2004
Posts: 3,124
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From: Milton/Westport, MA USA
me: 2015 SL400 & 2015 ML400; wife: 2022 GLC Coupe; daughter: 2017 GLC SUV
That might be it. I think I was closer to 75-80 with the E (in a hurry on a vaca day) and more like 65 in the CLK (no hurry on a blow off work day).
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From: VA
95 E300D, 97 FZJ-80
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Out Of Control!!
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From: Jerzy
04 CLK 320 > CLK32K
They say 60-65 mph is optimal driving. Driving down to FL a couple months ago confirmed this. Whenever I would speed up to 70-75 the mpg would go down. They also say using your AC at this speed (60-65) wastes less gas than having the windows open.
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