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#1
05-01-2003, 05:31 AM
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'95 E320 (W124) Gas Mileage
My 1995 E320 Sedan gets about 13mpg. Should I be worried? I do about 70% City/30% Highway Driving. My fuel filter has been changed recently. I have always used Chevron Premium, noted the cleanest gas in my area. Is there anything else I can do to increase my gas mileage? Thanks.
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'95 E320 Sedan w/224K Miles (W124) 
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#2
05-01-2003, 06:06 AM
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13 seems very low
Wow, 13 mpg sounds very low. I am pretty sure that I get 20 to 25 mpg. Even when all I do is drive the very short trips to work at low speed, I get about 20 mpg. When I drive the highway on a trip for vacation, I always get 25 mpg. I only have 70K miles, but it seems like there must be something affecting your mileage.
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I just couldn't give up on my 1995 E320.  I think it might be like always going back to that same bad relationship with an ex girlfriend. You feel you love them too much, or you are just too stupid to know any better.  Flickr slideshow of my 1995 E320 http://www.flickr.com/photos/24145497@N06/sets/72157616572140057/ Last edited by ksing44; 05-03-2003 at 04:32 AM.
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#3
05-01-2003, 06:16 AM
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tdhenning,
Check your fuel pressure, if it's too high the fuel consumption will be high with no other obvious symptoms.
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Paul Gibbons '93 320CE '73 Jensen Interceptor (Resting) Giant Full Sus Mountain Bike
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#5
05-01-2003, 12:24 PM
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td, I've got 164k miles on my 95 E320 and have never gotten below 20mpg with it, no matter how hard I drive (which is pretty hard). I usually get close to 30 on the highway regardless of temp. or whether the A/C is on or not. So I would say you most certainly have something wrong.
Do you know how to run the codes with the built in LED? I think Paul may be on to something when he mentions fuel pressure, and if it's too high then a code should be stored. That's the first thing I would recommend before you go tearing into anything or even getting gas on your hands, let the car tell you what's wrong with it. You didn't mention how it runs, is it running "normally" i.e. smooth and without drama or is it hard to start and running rough?
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#6
05-01-2003, 01:32 PM
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I am averaging about 22.5 mpg in mixed driving.
I'd check your O2 sensor.. It's almost always the reason for a dramatic drop in gas mileage...
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Paul S. 2001 E430, Bourdeaux Red, Oyster interior. 79,200 miles. 1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".
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#7
05-01-2003, 02:26 PM
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Is your Check Engine light on?
Average should be from 20-24 MPG Can you smell gas at start up or around the car?
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Zafar 94 E320 58000 Miles
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#8
05-01-2003, 05:31 PM
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In addition to the above good advice, check the engine wiring harness (use the search for wiring harness on this site). After I had a new harness, new plugs and a tune up, my mileage went from 15 to 20 in town. Ed
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#9
05-02-2003, 09:02 PM
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Type multimeter in the search and you will get a lot of usefull information about how to test the various systems of your car. Also, the DIY tab at the top of the screen has some information as well
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Zafar 94 E320 58000 Miles
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