06 E 320 cdi poor mpg
Thread Starter
Junior Member
Joined: May 2003
Posts: 34
Likes: 0
From: south jersey
04 sl600 04 cadi escalade 06 300c srt-8
06 E 320 cdi poor mpg
i bought a 06 e320 cdi and i only seem to get about 25 mpg with city and highway mixed driving...
i expected much better
anyone have any suggestions what could be wrong?
i expected much better
anyone have any suggestions what could be wrong?
Super Member
Joined: Jan 2010
Posts: 563
Likes: 31
From: The Villages, Florida
2006 E320 CDI
I only had my 06 for about 1 1/2 years. The worst it got was 24 and the best was 34. I would take it on the highway and reset the mpg while cruising at 70. It should come back in the 30's. If not, I do not know what could be the problem.
Mike T.
Mike T.
Member
Joined: Sep 2010
Posts: 134
Likes: 1
2006 E320 CDI 235 hp 420 ft tq
EPA was 27 city 37 Hwy with tires that where low roll resistance with out AC going.
Fuel is the next big thing always go to a place that moves the diesel. I seem to get better mileage from Shell truck stops.
I drove about 1400 miles over July 4 and my avg was 35 mpg it was with AC on all the time that about 150 miles in town.
Speed was around 75 mph in New Mexico and 70 mph in Texas.
I use a cetane boost in every tank.
My in town mileage is around 25 mpg.
The mileage gauge shows better most of the time upwards a 2 mpg.
My car is in the shop " I was hit" and the car that I'm in is a Chev Malibu
with a 4 cyl motor and the mileage is the same as my CDI with out the power or the other Benz goodies.
My last car was a 2003 VW TDI diesel and it would get 50 mpg with everything just right , it was easy to see what changed the mileage with it as a little things would show,.
I hope this helps
Fuel is the next big thing always go to a place that moves the diesel. I seem to get better mileage from Shell truck stops.
I drove about 1400 miles over July 4 and my avg was 35 mpg it was with AC on all the time that about 150 miles in town.
Speed was around 75 mph in New Mexico and 70 mph in Texas.
I use a cetane boost in every tank.
My in town mileage is around 25 mpg.
The mileage gauge shows better most of the time upwards a 2 mpg.
My car is in the shop " I was hit" and the car that I'm in is a Chev Malibu
with a 4 cyl motor and the mileage is the same as my CDI with out the power or the other Benz goodies.
My last car was a 2003 VW TDI diesel and it would get 50 mpg with everything just right , it was easy to see what changed the mileage with it as a little things would show,.
I hope this helps
Super Member
Joined: Jan 2010
Posts: 563
Likes: 31
From: The Villages, Florida
2006 E320 CDI
Mike T.
MBWorld Fanatic!
Joined: Jan 2011
Posts: 1,747
Likes: 20
From: Central Pennsylvania
2012 S350 Bluetec 4Matic, Diamond White, P2
Let me clarify my previous posting. The 34 mg was combined city/highway driving. While driving down I-95 in Virginia and resetting the computer, my cdi did average 38 mpg, but as soon as I pulled off the highway into city traffic, the average mpg goes down. I keep a Excel spreadsheet of fuel costs which includes mpg per tank of fuel.
Mike T.
Mike T.
Senior Member
Joined: Jun 2009
Posts: 268
Likes: 1
From: Northern Virginia
2006 E320CDI
My 06 E320 CDI routinely gets 40-41 MPG on straight interstate driving if I keep it at 65MPH. My average with mixed city and some interstate is 32 and that is checking it the old way with miles driven divided by gallons use. My trip computer shows an average of 31 over the past 10K miles which is mostly mixed city and interstate.
Junior Member
Joined: May 2004
Posts: 28
Likes: 0
From: Savannah
2011 BMW 335d Sport Package
These cars use a lot of oxygen and thus rely on the air filter. Did you check it or replace it lately? Mine just gained a couple of mpg's by getting a fresh oil change and new air filter. Going strong at 199,640 miles. Daughter just got 39 mpg at a steady 70 mph from GA to OH and back!
PL
PL
Trending Topics
MBWorld Fanatic!
Joined: Mar 2008
Posts: 3,714
Likes: 56
From: 1 hours drive north of Sydney Australia
2007 W204 220CDI Classic Sedan
Check how easily the car rolls , are the brakes binding ?
Your driving style can make a huge difference. For improved consumption :- no heavy acceleration or braking,anticipate traffic lights, drive slower ( get up 5 minutes earlier !), use A/C less, clean out heavy objects in boot, a few extra pounds in tyres, have car tuned to perfection( including as above) air filter .
Good luck.
Your driving style can make a huge difference. For improved consumption :- no heavy acceleration or braking,anticipate traffic lights, drive slower ( get up 5 minutes earlier !), use A/C less, clean out heavy objects in boot, a few extra pounds in tyres, have car tuned to perfection( including as above) air filter .
Good luck.
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Super Member
Joined: Jun 2006
Posts: 525
Likes: 0
From: the Netherlands
'01 W210 E320 CDI
The oxygen part is correct. I'm in Europe and I'm assuming your '06 still has the straight-six CDI as in my W210. How many Miles are on the car? It's a good chance your EGR valve and inlet manifold need cleaning. Mine were clogged with a thick gunk of sooth and oil after 285,000km (177,000miles) thus restricting airflow for about 25%. This manifested in thick black unburned diesel fumes in hot weather...
See this post:
cleaned-my-egr-traject-what-mess!
See this post:
cleaned-my-egr-traject-what-mess!
MBWorld Fanatic!
Joined: Apr 2006
Posts: 1,332
Likes: 4
From: Toronto
2006 E320 CDi, 2008 3/4 Ton Suburban, 2007 "rice rickshaw" Accord 5 speed
MBWorld Fanatic!
Joined: Apr 2006
Posts: 1,332
Likes: 4
From: Toronto
2006 E320 CDi, 2008 3/4 Ton Suburban, 2007 "rice rickshaw" Accord 5 speed
The oxygen part is correct. I'm in Europe and I'm assuming your '06 still has the straight-six CDI as in my W210. How many Miles are on the car? It's a good chance your EGR valve and inlet manifold need cleaning. Mine were clogged with a thick gunk of sooth and oil after 285,000km (177,000miles) thus restricting airflow for about 25%. This manifested in thick black unburned diesel fumes in hot weather...
See this post:
cleaned-my-egr-traject-what-mess!
See this post:
cleaned-my-egr-traject-what-mess!
