How to set engine temperature as default in multifunction display

C240 - When you turn on the ignition it appears that only two screens will come up as default on the multifunction display i.e. The odometer screen or the "after start" mileage & consumption screen
i.e will remain selected if that was on screen when you last switched the ignition off
I would like to set my multifunction display so that it defaults to engine temperature i.e. WHENEVER I start the car I get the horizontal temperature graph on the display - if I want ODO etc. then I can toggle to that.
Is this possible? If so how do you set the default?
I consider engine temperature more important than the other info & I'm tired of toggling to the temperature screen
Last edited by Glyn M Ruck; Aug 4, 2008 at 07:26 PM.
C240 - When you turn on the ignition it appears that only two screens will come up as default on the multifunction display i.e. The odometer screen or the "after start" mileage & consumption screen
i.e will remain selected if that was on screen when you last switched the ignition off
I would like to set my multifunction display so that it defaults to engine temperature i.e. WHENEVER I start the car I get the horizontal temperature graph on the display - if I want ODO etc. then I can toggle to that.
Is this possible? If so how do you set the default?
I consider engine temperature more important than the other info & I'm tired of toggling to the temperature screen

C240 - When you turn on the ignition it appears that only two screens will come up as default on the multifunction display i.e. The odometer screen or the "after start" mileage & consumption screen
i.e will remain selected if that was on screen when you last switched the ignition off
I would like to set my multifunction display so that it defaults to engine temperature i.e. WHENEVER I start the car I get the horizontal temperature graph on the display - if I want ODO etc. then I can toggle to that.
Is this possible? If so how do you set the default?
I consider engine temperature more important than the other info & I'm tired of toggling to the temperature screen


BTW - I always admire your signature pic of the SLR - my memory is not what it was but was this at Leguna the day before the Pebble Beach Concours? If it was I was sitting under the trees on the corkscrew. I've seen that car with Moss at the wheel and I'm sure it was at Leguna at the historical racing before the PB Concours. Used to live in Dallas & go up to the PB every year. Leno's collection is amazing
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Oh well, at least we can say we were amongst the last to see (and hear) it run.
Last edited by ScottW911; Aug 4, 2008 at 09:39 AM.
The Best of Mercedes & AMG

Oh well, at least we can say we were amongst the last to see (and hear) it run.
Do you have a high res copy of this photo?

C240 - When you turn on the ignition it appears that only two screens will come up as default on the multifunction display i.e. The odometer screen or the "after start" mileage & consumption screen
i.e will remain selected if that was on screen when you last switched the ignition off
I would like to set my multifunction display so that it defaults to engine temperature i.e. WHENEVER I start the car I get the horizontal temperature graph on the display - if I want ODO etc. then I can toggle to that.
Is this possible? If so how do you set the default?
I consider engine temperature more important than the other info & I'm tired of toggling to the temperature screen
Does ANYONE know how to change the default for the display to show temperature - If you solve this for me I will be forever in your debt
Does ANYONE know how to change the default for the display to show temperature - If you solve this for me I will be forever in your debt
I'll have to get back to you on a step-by-step, but all that changes is the tiny display, not the actual menu display.




When you show the outside temp in the cluster it will show the engine temp.
Seeing as the car never overheats .......
I dont suppose this information changes anything ?

Coming from the oil industry I don't believe in hammering engines when they are cold. Call me old fashioned but it's not hard for me to prove low temperature wear - I want to see that it has warmed up. I'm sure there must be a way to reprogramme that default. I would love to know how. Is the programming all sitting on an EPROM?
BTW I lived in Wollstonecraft Bay - Wondakiah Sydney for 5 years on assignment with Caltex - Great Great city!
Last edited by Glyn M Ruck; Aug 26, 2008 at 08:00 PM.



I am caught unaware that any of those are capable of being displayed on the MFD.
I know it is capable of reading the outside air teperature measured by a sensor near the front bumper. My car has an analog gauge for coolant temperature on the left of the instrument cluster.
Were one curious about the engine operating perimeters, one should connect a laptop armed with OBDII software to the port located below the steering wheel. One could configure the screen to read real time the temperatures of all of the above.
Speaking of Leno, saw him last week in his latest project car, a properly painted Jag Racr, slumming in Sun Valley.

I am caught unaware that any of those are capable of being displayed on the MFD.
I know it is capable of reading the outside air teperature measured by a sensor near the front bumper. My car has an analog gauge for coolant temperature on the left of the instrument cluster.
Were one curious about the engine operating perimeters, one should connect a laptop armed with OBDII software to the port located below the steering wheel. One could configure the screen to read real time the temperatures of all of the above.
Speaking of Leno, saw him last week in his latest project car, a properly painted Jag Racr, slumming in Sun Valley.
I have a pre facelift cluster and the coolant temperature is displayed in a horizontal bar graph in the display in the centre of the speedometer. No analogue guage - post facelift they remedied this with a guage.
The temperature is one layer down in the menu from the odometer. The only 2 standard defaults are ODO or the fuel, distance, time parameter screen.
All the other host of info screens have to be accessed every time you want to see them - including stupidly - coolant temperature
I would like coolant temperature to come up every time I fire up the car without me having to select it - it's a pain - so yes I want temperature as one of the display defaults - coolant temperature is OK for my purposes. One can debate which temperature is most important to watch but coolant is fine for my purposes. Many would say oil temp more important.
Are you confident that this could be set with OBDII software or do you mean could be configured on the computer screen? Where would I get that in my backwater - Presume I should go to my dealer and use his Star? They have already told me that they don't know how to do it but have never tried.
Last edited by Glyn M Ruck; Aug 27, 2008 at 05:51 AM.





Coming from the oil industry I don't believe in hammering engines when they are cold. Call me old fashioned but it's not hard for me to prove low temperature wear - I want to see that it has warmed up. I'm sure there must be a way to reprogramme that default. I would love to know how. Is the programming all sitting on an EPROM?
BTW I lived in Wollstonecraft Bay - Wondakiah Sydney for 5 years on assignment with Caltex - Great Great city!
CAN-C to serial chip, code offset in PIC chip to retain memory value of engine temp and attach output value to $5 LCD thermometer. Put clock in ashtray and raise lid on ashtray. Better still .... conceal array LED in cluster housing.
White - cold
Red - Warm
Flashing red - Ooops.
A million ways to do it .... the temp data is running on the engine harness every split second. What you want is a decoder chip to serial data project with an LCD display (like a modfied thermometer LCD) but with a different input chip running off the CAN-C.
Change the LCD for a dashmounted pro-racer TEMP guage.
Its possible but entirely up to your flavour. There is a man in Chicago who does custom chip coding. What you want is a serial converter or output levels from the raw engine data.
The cluster itself is not easily modified because then if it was we could add lap times and move things around so that Mercedes would get confused and annoyed every oil change.
Sydney is very pretty but the housing crisis is making things impossible for young couples.

CAN-C to serial chip, code offset in PIC chip to retain memory value of engine temp and attach output value to $5 LCD thermometer. Put clock in ashtray and raise lid on ashtray. Better still .... conceal array LED in cluster housing.
White - cold
Red - Warm
Flashing red - Ooops.
A million ways to do it .... the temp data is running on the engine harness every split second. What you want is a decoder chip to serial data project with an LCD display (like a modfied thermometer LCD) but with a different input chip running off the CAN-C.
Change the LCD for a dashmounted pro-racer TEMP guage.
Its possible but entirely up to your flavour. There is a man in Chicago who does custom chip coding. What you want is a serial converter or output levels from the raw engine data.
The cluster itself is not easily modified because then if it was we could add lap times and move things around so that Mercedes would get confused and annoyed every oil change.
Sydney is very pretty but the housing crisis is making things impossible for young couples.
Yes - Sydney property is a hell of a price - I was paying $1000 a week in '99 for a 2 bedroomed apartment - albeit a nice apartment with stunning view & own floating dock


Thank you very much for the input but that is just too much of a nightmare for mere mortals. I don't want to replace half the car.

Thank you very much for the input but that is just too much of a nightmare for mere mortals. I don't want to replace half the car.
The shiney spot on the steering wheel will be cheaper and easier to fix than any of these complicated re-works.




..) Is it doable? 