I have a "normal" farenheit outside temp guage. It is acting silly. For the longest time its been blank and hasn't displayed the outside temp. This has been for the last 1 year. Now, sometimes when I start my car, initially it will show the temp but will go blank after a few second or a few minutes. What could be the problem? Is it an easy fix? Thanks!

Anyone?

Well, I can't definitavly say for your model - I have a 126, however, from what you describe it sounds like the temp sensor on the blink - needs replacing and should just plug in.

Cheers

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1988 W126 420 SE

beware of fundamentalists!

It comes on every morning for a few seconds but then it goes blank!

It will show blank if it receives a nonsense input from the sensor. So a blank display is a pretty good indication that you need a new sensor. Not sure if the mounting point had changed by 1995, but on earlier 124 chassis cars the sensor itself was at the front license point, and its wiring snaked back to a plug inside the fuse box. The sensor & cable assembly itself is priced at ~$70 online.

My 1993 is doing more or less the same thing. Haven't really pursued it, so I'm uncertain if there is a fix other than the $70 cable.

- JimY

you can simply replace the sensor itself with a 3300 ohm thermistor. What I did was cut the sensor wire as close to the end (metal sheath) as possible. Drill out the epoxy and old sensor bits from the metal sheath. Solder the new 3.3k ohm thermistor (not resistor) to the two exposed wires. Wrap one or both of the exposed leads/wires in black electrical tape. Fill the metal sheath with epoxy and shove the new thermistor into the sheath. Then let the epoxy dry a bit and screw it back into the mounting bracket on the car.

Cost: ~$10 (the termistor is a $1 item plus shipping from most online electronics retailers such as digikey.com or mouser.com)

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Daily Driver: 02 E430 4MATIC
In the family: '03 E500 // '04 ML500 // 64 220SE