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Mechanicals / Re: Fuel Economy
Last post by goldacre - Yesterday at 09:00 PM
My 1979 450SEL (4.5 ltr) low compression Australian delived car on its best run was 13.1 litres per 100 klm on a 45 degrees Celsius day (damn hot) AC on and cruising at 100kph and was very happy with that.

On other runs where traffic driving, freeways etc it ranges from 14 liters to 18 liters per 100klm.

I find using the low octane fuel which is reported to be 91 octane increases consumption by 1 ltr per 100klm from experience but do run hi octane at 98 on long trips when weather is hot but have been told would need to tweak engine timing to get full benefit? Slightly more advanced apparently?

Test Drive / Mercedes Classics with Pierre ...
Last post by gurrier - Yesterday at 03:05 PM
Interesting video on the W116
Mechanicals / Re: Fuel Economy
Last post by Type17 - Yesterday at 08:13 AM
Over the last 7,200 miles / 10 years, my 350SE has averaged 17 MPG Imp. / 14.1 MPG US / 16.6 l/100km

Best was 22.5 Imp. / 18.7 US / 12.55 l/100km - a Mercedes-Benz Club run on quiet highways at around 80-90km/h / 50-55mph

Worst was 13.2 Imp. / 11 US / 21.4 l/100km - a half-tank where I consistently got stuck in heavy city traffic.

PS: If you have an iPhone, I recommend the Road Trip app - great for logging fuel, servicing and other expenses (no connection with it, just a happy user). I've logged all my cars since 2012 -
Mechanicals / Re: Fuel Economy
Last post by UTn_boy - 02 December 2022, 01:49 PM
If you have a U.S. version 450se it'll have a low compression engine.....somewhere around 8.00:1.  The U.S. versions take regular unleaded 87 octane.
Mechanicals / Re: mercedes 280 se w116
Last post by paraguaiano - 02 December 2022, 09:38 AM
Thanks you!!
Mechanicals / Re: 450 SE flasher relay
Last post by Gpapaniko - 02 December 2022, 07:18 AM
Just replaced mine, Pelican parts but you are going to pay over AUD200 for it. An old school auto electrician may be able to configure a generic one for you cheaper.
Auto Torque / Re: Need EPC help finding engi...
Last post by belchmarvel - 02 December 2022, 04:54 AM
Give me more detailed information about it!

Mechanicals / Re: Fuel Economy
Last post by raueda1 - 01 December 2022, 08:18 PM
Quote from: daantjie on 15 March 2021, 11:40 PMWith the 6.9 you are lucky to get 8-10 mpg in town.  Freeway about 12-14.
Basically this ^ what Daniel said though I actually seem to do a little better around town.  But maybe he engages the full 6.9 effect more than I do.  Best I ever did on the highway was 15 mpg.  That was with a tailwind and constant-but-gentle continental downslope from Colorado to Iowa.
Mechanicals / Re: Fuel Economy
Last post by BenzTragic - 01 December 2022, 07:48 PM
Quote from: BCDC on 24 March 2021, 12:35 AMMy advice is don't worry about it. I get around 15L/100km using 98 octane here in Australia. Slightly better on long runs. These cars are heavy so "milage" is irrelevant. They feel the same at 160km/h as 60km/h. There is no point pussy footing around with this car, they love to rev so drive it like you want. This is exactly why they have 96 litre fuel tanks. Enjoy and pretend you don't care about the money.

Great advice and exactly what my indy mechanic tells me. I've just had my fuel head rebuilt (again...) and a few others things sorted within the fuel system. I just measured mine and got 16.9L/100km.
Mechanicals / Re: mercedes 280 se w116
Last post by Jan S - 01 December 2022, 06:26 PM
Quote from: paraguaiano on 01 December 2022, 03:33 AMhello everyone, unfortunately I was not able to insert the photos. OK it is not a problem.
only now I need some essential information. Could someone tell me how many NM you have to tighten some screws? type how many nm, with the torque wrench do you have to tighten the screws of the water pump? Or the pulley under the water pump? Or the oil pan bolts? Finally, which oil is suitable for the engine? we are talking about a 2800 cc mercedes m110 engine. Thanks a lot everyone for any responses. Hello

I use Liqui Moly for my 6.9

Liqui Moly recommends the same oil type for your engine (

This is my preference.