Hi - new member req advice so be gentle please :D

[Hairy B]

Hi everyone,
Just bought a 55 plate w203 deisel saloon and love it apart from the poor fuel economy compared to my old BMW Compact & Mondeo which used to give me 50 & 42mpg compared to the c classes 30 driving like Miss Daiseys driver !!!
Now i'm aware that I don't work too far from work (about 10miles) but I used to thrash the ****e out of the bimmer & the worst I ever got was 47mpg. My journey is 2 miles to the M4 6 miles to Maidenhead and another mile or 2 of b roads so I recon it ought to be better - please tell me if i'm expecting too much......

Well after some reading i'm contemplating getting a remap/box fitted which ought to see some gains, but not sure who where to go to in the Slough area - I believe there is a tuning place on the trading estate, but not sure what they're like so can anyone shed some light..... Don't really want to travel far as i'm busy as hell evenings & most weekends but will gratefully accept advice on places within 10-15ish miles radius or a GOOD mobile company - thanks in advance !!!!

seen this on ebay - anyone know anything about them ??
ECU TUNING REMAP CHIP BMW MINI MERCEDES KOMPRESSOR TURBO SPRINTER SMART MG | eBay

Master Mercedes Tuning File, Mercedes Tuning & Mercedes ECU Remapping Support | eBay

 

[The _Don]

Hi Hairy B ( the left or right one )

Sell it and purchase a petrol car.

 

[Reggie-rock]

I'm afraid I agree, petrol is much better for short journeys.

 

[Hairy B]

Really REALLY !! Sell it..... If petrol is sooo much better then why did I get 50mpg from the bimmer & 40+ from the old mondeo doing the same length of journey ??? Why are london cabs diesel ??? Never got above 30 with any petrol cat unless I was on a run !! My friends 180 Kompressor is barely doing 35mpg on a similar distance so sorry I deliberately bought the diesel for the extra mpg and i'm concerned that there maybe an issue so was asking for advice from the forum experts rather than fork out a wad of cash by going to MB

I'm sorry if this comes over as being rude but as I said in my first post I just bought it so ain't gonna take a hit & sell it straight away - I love the car & the only downside is the mpg.......

 

[martyz]

That is low,is your temperature gauge sitting just above 80 degrees? lazy thermostats
cause poor mpg as the ecu fuels for a colder engine.rolling resistance,brakes binding etc
is another cause,blocked air filter another...

Oh, and Welcome.

 

[merc85]

A bloke at work get 50mpg from his c220 55 reg no problem at all,

Perhaps check the temp is where it should be, also a service may help to

 

[tec]

In my experience remaps will make the MPG even worse, unless doing very long motorway journeys with not too much over the speed limit.

 

[HITECH]

I've got same car. I can regularly get 50mpg out of mine easily more on long motorway runs. Any kinda stop start n low gears high revs is gonna decrease it. What I usually do with every car I buy is try keep revs down every gear change to 2500-3000 for say the 1st week. Including highest gear or in. Also no over taking which will require higher revs which in turn guzzles more fuel. Seriously try it for a day or 2 and u will see what I mean. Concentrate on where our revs are going when u change gear and when our in our highest driving gear. If u got an automatic then ignore everything I just wrote and buy a manual.

 

[Hairy B]

Thank you guys THIS is what I thought too !! Btw it is an auto which I know will drop me a few mpg, but not 10-15.....
@Martyz - yes its above 80 and gets there reasonably quickly tho not as fast as my old Ford & thanks for the welcome ;-)
Can't feel any sticky brakes & it takes a while to slow if I take my foot off the go pedal.
It had a basic oil/filter service before I picked it up, but was thinking of swapping the paper air filter with a K&N or one you guys recommend ;-)
@Hitech - I drive around with it around 2000 revs (quite easy to do with an auto with tip). and usually sit at a steady 60-80 mph on the motorway (depends on traffic) but don't hit the kickdown or accelerate hard which is why i'm concerned......
I am about to bung some miilers & inj cleaner in but will wait for when I fill it so I have some form of reference - currently done almost 1/2 a tank for 190 miles if I remember correctly :-(

Thank you all for your advice & please keep it coming - anything constructive is gratefully accepted, but i ain't gonna sell it LOL

 

[MancMike]

Really REALLY !! Sell it..... If petrol is sooo much better then why did I get 50mpg from the bimmer & 40+ from the old mondeo doing the same length of journey ??? Why are london cabs diesel ???

Wow, calm down...

London cabs aren't doing short journeys. They're doing ~150 miles per day.

It's the cold engine warming up that makes all engines inefficient, where initially it's basically a big kettle.

MPG aside, petrols are more advisable for short journeys, that's all's what was being said.

 

[SquabzZz]

When my Mrs drives the c220 to the station in the morning 5 mile dual carriage way the engine barely warms up she's averages 30-38 mpg depending if it's a straight run or a bit of traffic

I can do the same journey and easily get 38 all day

On a long run I can average 58-62 mpg the Mrs gets 50-55

The point I'm trying to make is either driving style or a señor messing up your mpg

 

[nb_racing]

My golf 2.0 Tdi is crap on fuel on short journies. On a nice run it'll do 55+.
Can't comment on the bmw or mundaneo but I personally would expect what you're getting from the Merc. Sorry.
Get it checked out make sure it's not faulty.
Welcome to the forum!

 

[Erfan]

Worth doing an Italian tune up and full service?

 

[tec]

Check the brakes are not binding also!

 

[Hairy B]

Erfan will fill up soon with some vpower & bung some good injector cleaner & give it a blat one quiet night

tec - can't feel any unwarranted heat from the wheels so don't think there is any binding but will keep an eye on it

I have just ordered a ocd2 blue tooth code reader which i'll connect to my phone as soon as it arrives....

Thank you all for the advice ;-)