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C200 Petrol (UK) MPG

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Old Apr 21, 2015 | 07:54 AM
  #1  
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C200 Petrol (UK) MPG

So a question to the Europeans on here with a C200 Petrol. What mileage do you have on the car now vs typical driving routes vs MPG?

I've just 700 miles on my S205 now and while MPG is improving as it runs in, I still find it quite a lot lower than I expected.

I never expected quoted figures of high 30's/40's/50's but I'm struggling to get above 25mpg knocking about/short (<10miles) runs from cold (auto, driving smoothly) and 35mpg on a lengthy motorway run.

I'm hopeful that this will improve as the engine runs in but at the moment its doing the same MPG as my BMW z4, 6cyl 3.0 twin turbo (admittedly with 30K miles).
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Old Apr 21, 2015 | 08:26 AM
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Ours (S205) is diesel with 5K miles on it and we struggle to get above 40 (low 30's to start) though it is improving. Think book says 80ish.

As yours is petrol I imagine it'll be a lot worse.

I gave up worrying about mpg and just enjoyed driving it.... When it all works ok.
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Old Apr 21, 2015 | 08:36 AM
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I've got an S205 C200 also. I've done 1,800 MPG since taking delivery.

I get high 20's / low 30's mpg pottering around town. Usually 45 mpg on longer distance. When I go into the office, there's a 20 mile stretch with 50mph average cameras and I always get 45mpg for that.

Last week I did London to Newcastle and back (mix of 75mph and 50mph temp) and got an average of 45mpg. Reasonably happy with it (especially as my employer pays 45p/mile!). Managed to get 80 or so 'extra' miles each way by being gentle with the right foot.

I drive around almost always in comfort but occasionally switch to sport if I'm joining a motorway or dual carriageway. At motorway speeds with Distronic active, switching to Eco didn't seem to make any difference (same 2,000 RPM at 74 mph). I haven't used it much but I think Eco just numbs the throttle response and speeds up gear changes.

I disable stop/start if I'm in stop/go traffic as it's not often 'off' for long enough to get any benefit. I leave it on for things like red lights and level crossings though.

I'm on 17' tyres if that makes any difference (probably minimal).
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Old Apr 21, 2015 | 08:39 AM
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Originally Posted by Razzyh
Ours (S205) is diesel with 5K miles on it and we struggle to get above 40 (low 30's to start) though it is improving. Think book says 80ish.

As yours is petrol I imagine it'll be a lot worse.

I gave up worrying about mpg and just enjoyed driving it.... When it all works ok.
I'm not too hung up about the MPG. The petrol car was a lot cheaper to buy, uses cheaper fuel, is cheaper to service etc. than diesel, plus I don't need to worry about DPF etc. Too many people just look at the MPG when comparing petrol and diesel and don't realise the other costs to buying and running a diesel. In my case for the mileage I do, it would take over 40,000 miles before a diesel would start to save me money. I'd rather keep that money in the bank. I've also not had any issues, touch wood, so far.

I'd expect the diesel to be more efficient, but I don't do the miles for one, nor did I like the noise it made. The petrol, while not completely silent, is certainly very quiet.

My post is more about the rather wildly differing values from the expected level, what I'm seeing and what others see on the same engine as mileage increases and the engine free's up a bit.

Last edited by ManiacGT; Apr 21, 2015 at 08:49 AM.
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Old Apr 21, 2015 | 08:46 AM
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Originally Posted by W124-FTW
I've got an S205 C200 also. I've done 1,800 MPG since taking delivery.

I get high 20's / low 30's mpg pottering around town. Usually 45 mpg on longer distance. When I go into the office, there's a 20 mile stretch with 50mph average cameras and I always get 45mpg for that.

Last week I did London to Newcastle and back (mix of 75mph and 50mph temp) and got an average of 45mpg. Reasonably happy with it (especially as my employer pays 45p/mile!). Managed to get 80 or so 'extra' miles each way by being gentle with the right foot.

I drive around almost always in comfort but occasionally switch to sport if I'm joining a motorway or dual carriageway. At motorway speeds with Distronic active, switching to Eco didn't seem to make any difference (same 2,000 RPM at 74 mph). I haven't used it much but I think Eco just numbs the throttle response and speeds up gear changes.

I disable stop/start if I'm in stop/go traffic as it's not often 'off' for long enough to get any benefit. I leave it on for things like red lights and level crossings though.

I'm on 17' tyres if that makes any difference (probably minimal).
Thanks. That's the sort of thing I'm looking for. I'm glad you're seeing 45 on a run as I don't see that presently, I get 35. Interestingly I've found its better on MPG driving yourself rather than using cruise etc. For example, when driving yourself, in ECO mode, there is a lot of coasting, which saves fuel. When in cruise, coasting never activates and so fuel is used constantly to keep a speed.

Oh I did like that bit on the start of your post ' I've done 1,800 MPG since taking delivery.' Fab!
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Old Apr 21, 2015 | 08:48 AM
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Originally Posted by ManiacGT
I'm not too hung up about the MPG. The petrol car was a lot cheaper to buy, uses cheaper fuel, is cheaper to service etc. than diesel, plus I don't need to worry about DPF etc. Too many people just look at the MPG when comparing petrol and diesel and don't realise the other costs to buying and running a diesel. In my case for the mileage I do, it would take over 40,000 miles before a diesel would start to save me money.
Indeed. There's a good calculator for people undecided on petrol/diesel and want to consider the bigger picture (rather than just MPG alone).
http://www.which.co.uk/cars/driving/...el-fuel-costs/
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Old Apr 21, 2015 | 08:56 AM
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Originally Posted by W124-FTW
Indeed. There's a good calculator for people undecided on petrol/diesel and want to consider the bigger picture (rather than just MPG alone).
http://www.which.co.uk/cars/driving/...el-fuel-costs/
Nice link. According to that I'd be looking at roughly 4 years of owning the diesel before I started to make savings, on fuel price/mpg alone. Backs up my thoughts and why I went petrol.

Anyhow so we don't get off topic, I'd be interested to hear other experiences of running in vs mpg.
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Old Apr 21, 2015 | 02:20 PM
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I have been getting about 29mpg doing runs mainly between 2 and 12 miles. On a longer motorway run it'll get about 40mpg. I decided the effort required to achieve 30mpg on my commute instead of 27 wasn't worth it. I'd rather drive the car in a more engaging manor and take the slight mpg hit, which probably equates to less than 20 quid s month anyway.

Are these cars supposed to do about 50mpg on the combined cycle? That is a laughable figure really.

Most 2 litre cars of old would be supposed to get about 30mpg on the combined cycle. My Audi A4 and Civic Type R were supposed to, and both achieved it. It seems newer cars get the same figures in reality, with only the quoted book figures going up.

Last edited by mikeyw; Apr 21, 2015 at 02:24 PM.
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Old Apr 21, 2015 | 04:04 PM
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C200 AMG Line Premium Plus
I have just over 2,000 miles on my C200 now and the best I have managed is 31 mpg.
That's measured with the computer and reset each time I fill up with petrol.
My daily drive is a couple of miles of urban roads followed by around 15 miles of motorway, each way.

Nowhere near the Mercedes claimed figures but then again, I never expected to see those!
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Old Apr 22, 2015 | 02:14 AM
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Quite low figures but hey ho. It's made me realise how well BMW did with my n54 engine as that's not much worse in mpg and it develops over 300bhp.
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Old Apr 22, 2015 | 04:37 AM
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Originally Posted by ManiacGT
Quite low figures but hey ho. It's made me realise how well BMW did with my n54 engine as that's not much worse in mpg and it develops over 300bhp.
To be honest I think you'd get similar results from an A45 AMG.
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