What mpg is your merc returning.??

[The Pan Man]

M p g

E 270 CDi Avantgarde Remapped. 93,000 miles. Since Feb 2009 40.1 Average 46.0 on run Normal progressive driving. 70 -75 MPH on Cruise control will return 50+ MPG (Don't use that much) Checking every 6 or 8 weeks with a brim to brim against the computer shows less that 1 mpg difference between the tankfull checked against the computer.

 

[S.Speed]

I certainly agree with "The Pan Man".. My trip computer is amazingly accurate..
My C270 CDI does 33-36mpg in rush hour stop/start traffic and usually 48mpg on a run.. I have has 52mpg on several occasions if I "try".

 

[television]

Since I fitted the larger tyres to my SL , I have lost the 10% speedo allowance and it now reads spot on and the computer tallies exactly with topping up the tank. In Comand I can alter the tyre size to keep that accurate too

 

[Honeybadger]

I just got a C270 CDi 2005 and get same as Pan Man and Simonarius, well pleased.. .

 

[c200 esprit]

1999 c250 turbo diesel estate
averages at 25 mpg no matter how you drive anyone know whats up with it

 

[turbopete]

you will probably have a fuel leak. the blanking nipple at the end injector or the leak off pipes are the commonest things on most cars. i had a c250td saloon, manual which gave me an average of 40mpg and i drove it quite quickly most of the time!

 

[jehampshire]

I have 1984 280 SL from Yorkshire to Dorset & return 620 miles I got 31 miles per gallon - my first long run since I got the car 12 months ago and following major rebuild.

 

[television]

I have 1984 280 SL from Yorkshire to Dorset & return 620 miles I got 31 miles per gallon - my first long run since I got the car 12 months ago and following major rebuild.

Welcome to the forum,,Dorset is not the most friendly place to drive around in, owing to all of the hills.

 

[Mr Teddy Bear]

Hi All

My C230K manages 24 / 25mpg on short trips: 10 - 20 miles; 30-32mpg on medium trips: 40 - 60 miles and approaching 40mpg on long journeys of 100+ miles.

REGARDS

Phil

Hi Phil I assume you have the supercharged 111975 2.3 litre engine?
I ask because I struggle to achieve much over 30mpg

 

[pcman_jh]

2004 E220 CDI - 42MPG avg

My 2004 E220 CDI estate averages 42MPG. On a 300 miles round trip from Edinburgh to Glasgow avg'ing just over 60MPH (I wasn't in a hurry that day) I got 51.5 MPG (it reached 53MPG at one point). On the same trip with an avg of just over 70 MPH, it dropped to 47MPG.

I find the optimum speed for MPG is about 65, any higher and the MPG is hit.

I tend not to be stuck in nose to tail crawling traffic, but if so, the MPG drops to around 33 MPG, but soon recovers if I can get onto fast moving traffic.

For the size and weight of car, delighted with this consumption.

I had a Golf 2.0 GT TDI (140bhp) which avg'd 53MPG, getting to 60MPG on an ecomony drive, but just didn't have the comfort for day to day use, hence the E Class...you only live once, so treat yourself...

 

[jp williams]

50.6 mpg over the last 3,000 miles according to computer.
E220CDI AUTO EST@118,000miles.

Regards

Now 49.9 after 4000 miles!
Still more than acceptable with 119,000 plus on the clock.

Regards
John

 

[c200 esprit]

you will probably have a fuel leak. the blanking nipple at the end injector or the leak off pipes are the commonest things on most cars. i had a c250td saloon, manual which gave me an average of 40mpg and i drove it quite quickly most of the time!

no leaks of any sort from the old bus and shes only got 136k on her barely ran in i drive like miss daisy and struggle to see 30mpg

 

[EireJames]

34.5 mpg from my 1992 250 diesel, typical week for me is a 120 mile spin from Cork to Galway (half dual carraigeway half B roads, passing through 5 or 6 towns / villages, in and out of work Mon to Fri (2 mile spin) and back to Cork on Friday, quite a few shortspins for the weekend.

Happy enough with it, my Rover 400 diesel used to do 47mpg on the same driving and my 2.2 Prelude non Vtec auto returned 31 ish. I can see myself going back to a 400 diesel to be honest. The intercooled ones are about 15% lighter on diesel than the one I had.

 

[S500 Pete]

Who cares

I get 24.2 according to the computer over the last 2,000 plus miles and that seems pretty accurate. Pretty good out of a 5 Litre with mixed driving but never very slow. Why buy a 5Litre and then worry about the consumption?

I was expecting about 20mpg so happy with the consumption and permanently grinning with the performance when I can use it.

 

[gordonm]

On a run 18 mpg just old technology I expect but it's beautiful to drive 350SL 1980.!

 

[sailorP]

Intermediate fill-ups

Yes, I am doing intermediate fill-ups....

Provided I keep all the receipts, the calculation is the same, just more fuel and more miles.

The longer the distance and larger the amount of fuel, the smaller the percentage error will be if you didn't quite brim to the tank to exactly the same point between start and finish measurement.
There are other sources of error...slightly more bubbbles in the tank at start that at finish, or car on a slightly different slope at the two different garages etc...principle being, if the error is a given volume, the larger the measured volume, the smaller the percentage error, and more accurate the result.

I used to be into volume measurement in a big way (I worked on supertankers a lot)....so measurement inaccuracy is a bit of an issue (read obsesssion) with me....perhaps you can tell.

 

[giuseppe]

larger wheels

Since I fitted the larger tyres to my SL , I have lost the 10% speedo allowance and it now reads spot on and the computer tallies exactly with topping up the tank. In Comand I can alter the tyre size to keep that accurate too

Hi malc, what size wheels can I go to on my 2001, E220 cdi saloon, bigger diameter, more rolling distance, more miles/gallon, I hope.

 

[Alex M Grieve]

Yes, I am doing intermediate fill-ups....

Provided I keep all the receipts, the calculation is the same, just more fuel and more miles.

The longer the distance and larger the amount of fuel, the smaller the percentage error will be if you didn't quite brim to the tank to exactly the same point between start and finish measurement.
There are other sources of error...slightly more bubbbles in the tank at start that at finish, or car on a slightly different slope at the two different garages etc...principle being, if the error is a given volume, the larger the measured volume, the smaller the percentage error, and more accurate the result.

I used to be into volume measurement in a big way (I worked on supertankers a lot)....so measurement inaccuracy is a bit of an issue (read obsesssion) with me....perhaps you can tell.

As above, I keep a log of mileage and fuel consumed. Consumption calculated by distance per tank will vary a lot with weather, type of use, traffic and a host of other factors - so you could get lucky and have a very good score, but there are also bad days.

I tend to calculate overall consumption over longer distances, e.g. 10,000 miles, and all these variables mentioned (plus water content of the fuel, inaccurate metering at the pump) (both of concern to HMRC) are smoothed out.

Over 24,000 miles my W220 S Class diesel has averaged 39.2 mpg, which is a bit better than the Government Official figures that the manufacturers are obliged to quote.

Best tank, on the other hand, tends to be around 700 miles after which it takes 74 litres (43 mpg).

I think the most important point about fuel economy is just to think about it in the first place. As the cliché says, if you don't measure it, you can't manage it. Once you get a feel for the numbers you can achieve, you can get infected by the mpg bug and look for ways to improve your score.

The most important techniques are smooth driving and not going excessively quickly. You get there just as fast, but you are probably safer and less flustered - and a bit less poor!

 

[mercedes13156]

I've got an old 1998 C Class 220 diesel (non turbo). It's done 215,000 miles and it just keeps on giving me 40 - 45 mpg. It ususally gives 42 on the work journey. That's 70 miles a day with 30% on country roads and 70% on dual carriageways. I get 45 mpg on the motorway at 75 on cruise and the worst ever was a 300 mile high speed thrash down the M6 at 90 on cruise that gave me about 36mpg.

 

[mercedes13156]

I've got an old 1998 C Class 220 diesel (non turbo). It's done 215,000 miles and it just keeps on giving me 40 - 45 mpg. It ususally gives 42 on the work journey. That's 70 miles a day with 30% on country roads and 70% on dual carriageways. I get 45 mpg on the motorway at 75 on cruise and the worst ever was a 300 mile high speed thrash down the M6 at 90 on cruise that gave me about 36mpg.

I forgot to add that I've got a 2000 VW Polo. The one with the first of the PD diesels. The book says that it should have a combined consumption of about 61 mpg but I'm getting 67 / 68 mpg in normal running to work. I did a 600 mile round trip on the M6 at a steady 70mph and got just under 70mpg. The government extra urban figure is 75mpg.