My cruise control will work on days when it is really hot outside. On cooler days or in the mornings it doesn't work. What component in the system would react to heat and function normally. Larry

Sounds like a loose or broken connection somewhere. Heat from the engine causes the bad connection to expand and remake the connection.

At least your's semi works. Mine does not.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Another possibility is the electronic "amplifier" that lives in an aluminum box under the driver's side of the dash. It's full of electronic components that can be heat sensitive and the printed circuit "wiring" itself has a tendency (in these vintage vehicles) to develop cracks in the soldered connections between the board and the components.

If you can't trace the problem to something else, you can resolder every connection on the board or replace it with a rebuilt for about $200. I have put two boards back in commission by resoldering them.

Jeremy

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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