Hi All recently bought a Mercedes e class e280 cdi w211, not happy with fuel economy is something wrong?

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mondotex

Member
Joined
Nov 16, 2023
Messages
44
Location
manchester
Car
Mercedes e class w211 e280 cdi saloon
Hello Guys,
Bought this car around 6 weeks ago is a 09 plate had 83000 miles only 2 previous owners, last owner had it for 13 years,
Very well maintained by previous owner last full service was done in march.

I'm concern about fuel economy mostly i drive in town short journeys average is 19 miles per gallon,
Please note traffic is not bumper to bumper like in busy cities, my town is 6 miles from Manchester city center.
Also on motorway i have done 50 miles yesterday cruising at 70 / 80mph and it was 35 miles per gallon.
wanted to know if this is normal for its age?

if anyone can help me that would be great,
Thanks in advance.
 
So many variables when it comes to consumption.

1st check is running temp.
I should get above 80c within a few miles, and stay up there.
If it's slow to get there and /or fluctuates, it's a fair bet the thermostat is goosed.

Your engine is likely to have a DPF, to see if it is regenerating toooo much you really need to monitor the exhaust temperature. That's a bit more involved.

Check the coolant running temperature 1st.
 
Probably about right. Its an old engine and town work will kill MPG. Also I would say you were lucky to achieve 40mpg on a motorway run. Nice engine but not particulary frugal im afraid to say.
 
So many variables when it comes to consumption.

1st check is running temp.
I should get above 80c within a few miles, and stay up there.
If it's slow to get there and /or fluctuates, it's a fair bet the thermostat is goosed.

Your engine is likely to have a DPF, to see if it is regenerating toooo much you really need to monitor the exhaust temperature. That's a bit more involved.

Check the coolant running temperature 1st.
Hi,
Running temperature is above 80c after few miles.

Also I have noticed when engine is cold,
When driving white smoke coming from exhaust have bit of diesel smell.

Sorry I don't know much about cars,
That's why before going to a mechanic wanted to have some better understanding.
 
Hello Guys,
Bought this car around 6 weeks ago is a 09 plate had 83000 miles only 2 previous owners, last owner had it for 13 years,
Very well maintained by previous owner last full service was done in march.

I'm concern about fuel economy mostly i drive in town short journeys average is 19 miles per gallon,
Please note traffic is not bumper to bumper like in busy cities, my town is 6 miles from Manchester city center.
Also on motorway i have done 50 miles yesterday cruising at 70 / 80mph and it was 35 miles per gallon.
wanted to know if this is normal for its age?

if anyone can help me that would be great,
Thanks in advance.
When you say "most I drive in town short journeys," what kind of distance do you mean, and what kind of time of day? What is the overall mpg since you have started to use the car? (Not just on yesterday's motorway drive."

I used to use my young petrol E55 to take my children two miles to school, and saw roughly 9.5 mpg on those trips. I think my overall mpg was 'normal" at 22mpg

Your numbers sound "normal" to me - and to Honest John:

https://www.honestjohn.co.uk/realmpg/mercedes-benz/e-class-2002/e280-cdi
 
Hi,
Running temperature is above 80c after few miles.

Also I have noticed when engine is cold,
When driving white smoke coming from exhaust have bit of diesel smell.

Sorry I don't know much about cars,
That's why before going to a mechanic wanted to have some better understanding.
Smoke from the exhaust, when it's vapour, isn't a great worry.
Smelling of diesel is a worry.

When cold, at least when the exhaust is cold (but it can heat up v fast), it can be a big worry.
I've experience, and read, of these engines regenerating too often. But we aren't sure yours has the DPF.
If you post your VIN we can tell you easily enough.

I had all injectors replaced with new, and think I read of others having dome the same, to no avail. A lot of money, for no advantage.

Sorry to come across as gloomy, but for me to suggest remedies here would be inappropriate guess work.

You might take it to an MB Indie for a Star session. That may, or may not, bring up fault codes. But if you think there is issue that's the best step to take, imo.
I would be hesitant of going to a run o the mill mechy.
 
When you say "most I drive in town short journeys," what kind of distance do you mean, and what kind of time of day? What is the overall mpg since you have started to use the car? (Not just on yesterday's motorway drive."

I used to use my young petrol E55 to take my children two miles to school, and saw roughly 9.5 mpg on those trips. I think my overall mpg was 'normal" at 22mpg

Your numbers sound "normal" to me - and to Honest John:

https://www.honestjohn.co.uk/realmpg/mercedes-benz/e-class-2002/e280-cdi
I generally consider the 642 lump to return about 20% worse economy than the 646 (2.1) engine.

On an economic m'way drive from London to Derbyshire we saw 57mpg on the dash (it's pretty accurate tbh).
I can easily see 50mpg on a run.
But Mrs Me on her 7 mile commute will see low 30's. But if I were doing her commute I 'believe' my anticipation would be better, and I would use the fuel dump less often.
It's back to those variables I guess.
 
Get the car on the motorway then reset the mpg trip thingy when the car is warm at 70mph , you should see nicely over 40mpg . If that’s the case it’s working correctly.
Mine is always over 40mpg in sport mode on 600+ mile motorway and A road journeys to Wales and back
 
W211 was never the most economical car in the world. But possibly the best car :)

What you are seeing is only a little on the low side - but not by much. Is it auto?
 
Get the car on the motorway then reset the mpg trip thingy when the car is warm at 70mph , you should see nicely over 40mpg . If that’s the case it’s working correctly.
Mine is always over 40mpg in sport mode on 600+ mile motorway and A road journeys to Wales and back
My 3.5 litre V6 petrol returns those sort of figures.
 
Hello Guys,
Bought this car around 6 weeks ago is a 09 plate had 83000 miles only 2 previous owners, last owner had it for 13 years,
Very well maintained by previous owner last full service was done in march.

I'm concern about fuel economy mostly i drive in town short journeys average is 19 miles per gallon,
Please note traffic is not bumper to bumper like in busy cities, my town is 6 miles from Manchester city center.
Also on motorway i have done 50 miles yesterday cruising at 70 / 80mph and it was 35 miles per gallon.
wanted to know if this is normal for its age?

if anyone can help me that would be great,
Thanks in advance.
Hi , who fuel do you use ?
 
Many factors with the car traffic,temps,fuel,nobody want to address the elephant? Driving style and ability?
 
Also check the air filters are actually clean. There are reports on here of people having a car (having bought a car) with full on-time Mercedes service history, only to out of curiosity have a look at the air filters and find they were totally clogged and never changed since new (despite paying for an air filter change!).
 
When you say "most I drive in town short journeys," what kind of distance do you mean, and what kind of time of day? What is the overall mpg since you have started to use the car? (Not just on yesterday's motorway drive."

I used to use my young petrol E55 to take my children two miles to school, and saw roughly 9.5 mpg on those trips. I think my overall mpg was 'normal" at 22mpg

Your numbers sound "normal" to me - and to Honest John:

https://www.honestjohn.co.uk/realmpg/mercedes-benz/e-class-2002/e280-cdi
i do very short journeys, going to post office, gym, friends house, etc... all within 1/3 miles area, between 10am to 4pm
since i bought this i have done around 350 miles, which around 150 miles were on motorway and the rest in town.
 

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i do very short journeys, going to post office, gym, friends house, etc... all within 1/3 miles area, between 10am to 4pm
since i bought this i have done around 350 miles, which around 150 miles were on motorway and the rest in town.
That is all horrendously slow driving for a big diesel , it will be worse in winter when it’s colder .
 
Smoke from the exhaust, when it's vapour, isn't a great worry.
Smelling of diesel is a worry.

When cold, at least when the exhaust is cold (but it can heat up v fast), it can be a big worry.
I've experience, and read, of these engines regenerating too often. But we aren't sure yours has the DPF.
If you post your VIN we can tell you easily enough.

I had all injectors replaced with new, and think I read of others having dome the same, to no avail. A lot of money, for no advantage.

Sorry to come across as gloomy, but for me to suggest remedies here would be inappropriate guess work.

You might take it to an MB Indie for a Star session. That may, or may not, bring up fault codes. But if you think there is issue that's the best step to take, imo.
I would be hesitant of going to a run o the mill mechy.
Please check VIN IS WDB2110202B393638
 
Get the car on the motorway then reset the mpg trip thingy when the car is warm at 70mph , you should see nicely over 40mpg . If that’s the case it’s working correctly.
Mine is always over 40mpg in sport mode on 600+ mile motorway and A road journeys to Wales and back
Thanks i'll try that in few days.
 
Many factors with the car traffic,temps,fuel,nobody want to address the elephant? Driving style and ability?
temp is normal after few miles, for fuel i used Texaco or bp.
Driving style is normal.
 

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