Cruise control could be dangerous if used on wet/slippery roads or in heavy traffic.
It is not harmful but it dangerous.
It is dangerous to use cruise control while driving in the rain. The delay in reaction time caused by disengaging the function could be detrimental on a slippery surface. It recommended in most car manuals to avoid its use in the rain.
If the car is going up an incline, it will attempt to keep the speed constant with the setting of the cruise control. When that process is satisfied, the car may decelerate a bit to keep the same speed. If the car continually decelerates whe using the cruise control. stop using the cruise and have it checked. It id very dangerous to use the cruise control that is not operating properly. It could cause the car to accelerate unexpectedly.
Cruise control is an accessory.
It is possible to convert a car without cruise control to have cruise control. Many auto parts stores sell kits which will install cruise control in a vehicle.
There are several ways to fix the cruise control on your Mercedes-Benz depending on the problem with the cruise control. Make sure the fuse for the cruise control is not blown.
2004 sebring convertable cruise control not working - what to do?
There is no isolated fuse for the cruise control. It all runs off the 20A gauges fuse. If you are having trouble with the cruise control I would check the Cruise Control Module or the Cruise control Servo. What symptom is occurring?
If the cruise control on your 1987 300ZX does not work, you might have an issue with the cruise control fuse or wiring. You could also have a problem with the switch that turns the cruise control on and off.
Hopefully, you have had the cruise control module recall work done. It's free at any Ford, Lincoln or Mercury dealership. It can start a fire and be very dangerous. Take it to dealership right away.
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To use the cruise control on the PT Cruiser, turn the cruise control on in the steering wheel. Accelerate to the desired speed and push in the end of the left turn signal knob. The cruise control should then control the speed. To take the car out of cruise control, a person can tap the brake.