2003 E500 MPG!
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Junior Member
Joined: Dec 2013
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From: Garden Grove
2003 E500 Sport and 2004 E55 AMG
2003 E500 MPG!
I've been getting 11 mpg in the city and an average of 14 mpg on city and highway. what can i do to improve this? i've tried changing out my spark plugs and wires, but no difference. my car has 110,000 miles.
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Joined: Jun 2012
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2003 Mercedes E500 W211
Been Having this same problem, i'm averaging 10 mpg city and 13 mpg highway. Car seems to be running fine other than the mpg and the damn airmatic system.
What kind of problems u guys havin at 90k miles.
What kind of problems u guys havin at 90k miles.
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Joined: Dec 2012
Posts: 161
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From: Ridgecrest, CA
M113 E50 6-speed, 2005 E55 AMG
My swap is 3140lbs with me in it and I get 13 in town, 28 on the highway. A lot of it is my right foot but it still seems low for in town. I have new plugs, oil, coolant, everything except air filters (not too bad of a condition) and I'm missing the tubes for cold air, just running hot until I get the SS tubes I have coming with K&N's.
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Joined: Aug 2007
Posts: 61
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From: Nova Scotia, Canada
2003 CLK430 Cabrio, 2009 BMW 535 iX Wagon
I drove around with the Airmatic stuck in high for about two weeks (see https://mbworld.org/forums/e-class-w...r-message.html). Interestingly, that cost me 1 - 2 MPG, probably due to worse aerodynamics. Should have less impact in the city than on the highway, though. Therefore: Lower ride = better gas mileage. 
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Joined: Sep 2013
Posts: 32
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Tesla Model S
Yesterday, driving home....
Driving home from a school function (I am a coach), I noticed that I was getting reasonable MPG (this was after getting off the highway).
The interesting bit is that I was in "parking-lot" traffic for the first 10+ minutes of the drive home.
Here is a photo of the dash of my 2004 E500. Not bad MPG for a big V8 with a 137K+ miles on it. (Most of the trip was at 70+ MPH as that is the local speed limit on the highway.)
The interesting bit is that I was in "parking-lot" traffic for the first 10+ minutes of the drive home.
Here is a photo of the dash of my 2004 E500. Not bad MPG for a big V8 with a 137K+ miles on it. (Most of the trip was at 70+ MPH as that is the local speed limit on the highway.)
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From: Garden Grove
2003 E500 Sport and 2004 E55 AMG
I changed out my spark plugs, all my air filters, and even cut off my muffler to save 70lbs. still getting 11-12 city and 17-21 mpg up/down grade and 14 average. the only thing i can think of causing this is the mass air flow sensor or the fuel filter/pump. my e55 gets about 12-13 city and 17-18 mpg in dead stop traffic.
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Joined: Aug 2011
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From: Highlands Ranch, Colorado
2014 BMW M235i
In the city I average about 15 and on the highway about 19-21 in my 550. If I TRY to drive conservatively I get 18 city and I've seen as high as 27 highway, however it seems like you're getting E55 or E63 gas mileage - way too low.
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From: Highlands Ranch, Colorado
2014 BMW M235i
LOL that's true too, except for traffic I don't know what would keep me from tearing up those hills all the time, with the thrust of the E550 I feel like it's a roller coaster or a plane about to take off when I got WOT up a super steep hill.
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From: Highlands Ranch, Colorado
2014 BMW M235i
I had no idea you had C63 mufflers! That's awesome, those things sound like thunder from the factory it's amazing. I remember at the end of our Christmas eve church service I was walking back to the car and a C63 coupe started up in the cold right as I walked by it... wow.
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Joined: Sep 2013
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From: Bay Area
14 550 sedan
Those mufflers were the very first mods I ever did to my car. Got em off a brand new 2011 c63. They didn't even fit my luxury style bumpers with no cutouts but I didn't care. And yes, cold starts are mesmerizing 
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Joined: Aug 2011
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From: Highlands Ranch, Colorado
2014 BMW M235i
I bet in the parking lot of the dealership too 
just lifted them right off the C63s on the show room floor eh? My muffler delete and j-pipe was an early mod too, it makes for a much heavier foot I completely agree.
just lifted them right off the C63s on the show room floor eh? My muffler delete and j-pipe was an early mod too, it makes for a much heavier foot I completely agree.
