Disconnect the link rod from cruise actuator.

It sounds like the amplifier and actuator are failing = random activation = safety issue..

MB# 0235452132
Fastlane: REBUILT Cruise amplifier
http://catalog.peachparts.com/item.wws?sku=0235452132

MB# 0025458632
Fastlane: REBUILT Cruise Control Actuator
http://catalog.peachparts.com/item.wws?sku=002545863281

Here are some links that may allow you to fix the issue..

Cruise Control Repair Articles
http://www.peachparts.com/shopforum/showthread.php?p=883130

Cruise loves to work...When parked...LOL
http://www.peachparts.com/shopforum/showthread.php?t=137621



Have a great day.

__________________
ASE Master Mechanic

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D

https://www.boldegoist.com/