I'm looking to replace my Outside Air Temp Module from a 4 pin square to a 5 pin Flat. Is this easily done? and does anyone have a step by step Procedure? I have 6 or 7 Screens that all have the flat setup..

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hum.....
1987 300TD 311,000M Stolen. Presumed destroyed

This is easy.

4 pin square
Pin#
1. black/red wire to power (+12V)
2. brown wire to ground
3. green wire to sensor
4. gray/blue wire to illumination

5 pin in-line
Pin#
1. brown wire to ground
2. gray/blue wire to illumination
3. green wire to sensor
4. green/yellow wire to vehicle speed sensor
5. black/red or black/violet to power (+12V)

There may be some color variations. The speed sensor freezes the reading in stop-and-go traffic, when road heat would otherwise cause the display to erroneously read too high.

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"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970

Where would you tie into the speed sensor?

__________________
hum.....
1987 300TD 311,000M Stolen. Presumed destroyed

bump for the last Question?

__________________
hum.....
1987 300TD 311,000M Stolen. Presumed destroyed