CLK55 AMG, CLK63 AMG (W208, W209) 2000 - 2010 (Two Generations)

CLK55 Fuel economy

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Old 09-15-2014, 01:03 PM
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SL55 AMG
CLK55 Fuel economy

How many miles do most of you get out of a tank of premium? With gentle driving, highway driving, etc.

So far I've been averaging 21 overall, according to the car display. Thinking about changing the fuel filter, checking air filters, and doing spark plugs. Anything else that should be replaced that would affect fuel economy? Car has 70,000 miles by the way.

I suspect the car was sitting for a bit(few months tops) before I bought it.
Old 09-15-2014, 03:15 PM
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2001 Clk55 AMG
I get about 25.5 combined, mostly freeway from my '01. Have seen as high as 27.5 on freeway trips. 5000 ft. Elevation
Old 09-15-2014, 10:33 PM
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w215 - CL55 w/stage III
Originally Posted by todd5854
How many miles do most of you get out of a tank of premium? With gentle driving, highway driving, etc.

So far I've been averaging 21 overall, according to the car display. Thinking about changing the fuel filter, checking air filters, and doing spark plugs. Anything else that should be replaced that would affect fuel economy? Car has 70,000 miles by the way.

I suspect the car was sitting for a bit(few months tops) before I bought it.
I do mostly spirited city driving and so I'm averaging 17-18 -- when I'm gentle on the highway I can get low twenties -- I have seen high twenties on long highway trips - especially when I drove it home when I bought it which was a 1200 miles drive
Old 09-16-2014, 02:35 PM
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'06 clk55 : '18 Canyon Duramax: :91 325i : #33 So Cal Spec E30
We get about 20 highway. Don't think we've seen higher than 22. New plugs / wires / etc. The fuel filter is integrated into the fuel pump in ours, yours might be different. I'm kind of surprised people are getting such high numbers.
Old 09-17-2014, 06:58 PM
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Currently: 2019 E450 AWD, Previous: 2002 CLK55 Cab
I'm currently getting 21mpg on the hwy averaging 80mph. It would clearly be better if I used less right foot and had new plugs and wires.
Old 09-18-2014, 01:34 AM
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CLK55 and CLS55
who really cares, thats not what the car is for. If you want to save fuel, buy a Prius
Old 09-18-2014, 05:51 AM
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C63 507 AMG DA Car #19
Mpg

I can still get 23 mpg if I drive speedlimit on the fwy with blower cams exhaust ported heads.

I consider a mpg check as part of my regular 'tune' check, along with fuel trims, and afr.

To me this indicates a properly running tuned machine.


I agree with ozzfinn if the car is wildly modified, but the beauty of these modern machines you get hp tq and mlg.
Old 09-19-2014, 02:12 PM
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09 CLK550
17.4mpg over the last ~6500mi on mine. That's about 90% city driving
I was up to 18.1mpg over ~8000mi previously before I swapped the battery.

On the highways I usually get 22.
Old 09-21-2014, 05:59 AM
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E63 M157
Originally Posted by todd5854
How many miles do most of you get out of a tank of premium? With gentle driving, highway driving, etc.

So far I've been averaging 21 overall, according to the car display. Thinking about changing the fuel filter, checking air filters, and doing spark plugs. Anything else that should be replaced that would affect fuel economy? Car has 70,000 miles by the way.

I suspect the car was sitting for a bit(few months tops) before I bought it.
Check to see if your tires are low on air. But 21mpg is really good, didn't know this car can achieve that, was that 100% highway?
Old 09-22-2014, 08:19 PM
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SL55 AMG
Overall was about 17-18, and thats with occasionally stepping on it. But 90% highway driving, yeah, it was 22 absolute tops.


To the guy who told me to buy a prius. NO! Haha, the only reason I started this thread was to be sure my car was running properly. Good fuel filter, good air filter, etc. Although I will change those items anyway along with the spark plugs. That'll be next weekends project.
Old 09-23-2014, 12:14 AM
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CLK55
24 mpg today. 468 miles almost all highway at 90 mph. North east Wyoming to Colorado.
Old 10-15-2014, 07:54 AM
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C207 E350C
so far in the 3 days I've had it, 11 mpg LOL! oil is down to $80/bbl so I don't expect much improvement with my lead foot. YMMV giddyup

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