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1994 Mercedes E320 Wagon (W124) white
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230 Posts
Discussion Starter #1
My car is running *okay* but not great, and getting 20 mpg.

Is this indicitive of "limp home mode" ?
 

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W124 Moderator
86 190E 2.3L 16V, 2 95 320TE's, 02 S500
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12,758 Posts
If your car was in limp mode, you'd surely know. It would be an effort to get the car moving and attain 30 mph. 20 mpg for an all around average in a wagon is not out of line.

Jayare
 

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Registered
1994 Mercedes E320 Wagon (W124) white
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230 Posts
Discussion Starter #3
Thanks Jayare. I was hoping for an answer that would be worth doing something to chase better mileage.

Are there any fixes to get better mileage? Aftermarket injectors, computer or sensors?
 

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'95 E300 DIESEL, '91 600SEL, '92 600SEL
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17,400 Posts
+1 on what Jayare said,

In limp home mode, you wouldn't be able to rev the engine freely beyond about 1500rpm or so.

These are very heavy cars and it takes power and fuel to get them going..

So to get the best mileage, you kinda have to think like a F1 driver. In other words, braking is the worst enemy, and when you do have to brake, brake as late & hard as possible for the smallest duration while keeping momentum going.

I get 21 MPG in most city driving, and get approx. 24 MPG on the freeway but my wagon is usually loaded with several hundred pounds of cargo at all times.
 

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Registered
1994 Mercedes E320 Wagon (W124) white
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230 Posts
Discussion Starter #5
Thanks Sbaert, I already drive the car like it's a Bentley and I'm a limosine driver.

When I drive like all the other suburbanites on the road, my mileage goes under 20. ...and the car is empty all the time.

Recently had a 4-wheel alignment and tires are at 40 PSI. My territory is a suburban foothills area and we have no freeways on the Big Island.

I'll try an octane booster next.
 

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Registered
'95 E300 DIESEL, '91 600SEL, '92 600SEL
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17,400 Posts
Suggest you use Red Line SI-1 at full strength (1 bottle per tankful) for the next few fill-ups.

Also use on a tier 1 premium grade gasoline.

Octane boosters won't buy you MPG.
 
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