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1994 E420
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Discussion Starter · #1 ·
Hello. I just got an 1994 E420. I know BMWs pretty well but this is my first Mercedes.

I was just wondering what would be involved with changing the thermometer under the speedometer to read in Celcius rather than Farenheight. What would need to be replaced? Hopefully not the whole gauge cluster...

Thanks,
John
 

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'07 GL320CDI
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5,116 Posts
The whole temp display unit. $300+ because you can't find a used celsius model in USA. Perhaps Canada?
 

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1994 E420
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7 Posts
Discussion Starter · #3 ·
Thanks I'll have to start looking on eBay or somewhere. Do you know if the display unit is easily separated from the gauge cluster? I haven't had a change to look around behind there yet.


Thanks,
John
 

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Premium Member
About a dozen 1988, 1989, 1990, and 1991 sedans, wagons, 4Matics and 1 coupe
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5,512 Posts
It's very easy to change once you've pulled the cluster but beware. In my experience with model year 88s, a perfectly good used temp display will develop LCD problems once you transplant it. FRom what i can tell the unit is VERY sensitive to pressure and being careful may not be enough. Just the stress of disconnecting and reconnecting the thing way cause problems.

I bought a good used part from Potomac and the display started to turn black at the RH side within weeks. Now the F is gone and part of the far right digit.

I took my old one apart and everythng is great except the glass LCD "window." Too bad you can't buy just that part.
 

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1994 E420
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7 Posts
Discussion Starter · #6 ·
Thank you for the advice. I think I will go for the switch if I can find a Celcius but I'll be really careful.

Does anyone have one to sell me? haha

John
 

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jg673 - 4/5/2006 7:55 AM

Thank you for the advice. I think I will go for the switch if I can find a Celcius but I'll be really careful.

Does anyone have one to sell me? haha

John
Just learn to do the calculation in your head and save yourself the money...and aggravation[:D]
 

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1994 E420
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Discussion Starter · #8 ·
Yeah I guess I could just do that... I am familiar with both scales but I just like Celcius better, and it seems strange to me that they didn't make the units switchable and decided to make two entirely different parts instead.

John
 

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1994 E420
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Discussion Starter · #10 ·
Yes, it does work. That would be great. I just like Celcius better so I wanted to swap out the part. The car is down in Florida right now and I am in New York so I wouldn't be able to get the temperature unit for a week or two when I go down there.

John
 
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