Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Cruise Control with Braking Function: Notes
The cruise control with braking function has already featured in the BMW 3 Series (E9x). It is also referred to as "Dynamic Cruise Control" (DCC).
It relieves the burden on the driver on quiet roads by maintaining a constant speed regardless of the resistance to vehicle motion (gradient, payload).
It also offers the driver the opportunity to adjust the set speed in small or large increments, which is then set and maintained by the system by controlling power output and braking. The brakes are also controlled during steep downhill driving if sufficient deceleration is not achieved by engine drag-torque alone.
Dynamic Cruise Control in the F01/F02 is not computed in the DSC control unit as it is in other vehicles. Instead, it has been integrated into the ICM control unit.
The function has, of course, been newly configured for optimum compatibility with the F01/F02. Due to the new vehicle interior, there are differences in how the function is operated and how information is displayed by comparison with the function implemented in other vehicles. These are described here.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.