If you are seeing the icon attached below, that is simply telling you what you ALREADY KNOW:Hi! I have a 2007 323i and I keep trying to set my cruise control, but it says that it cannot activate (Cruise control + ! Symbol).
What are the steps you are suggesting to solve the issue or at least to find out the problem?!
If your ABS light is on, finding out WHY may solve your Cruise Control issue. ABS wheel speed sensors are connected to the DSC Module. Cruise Control (at least the S544 Option) is provided via the DSC. So the ABS warning light and Cruise Control Non-function are likely related....I have 2 more lights in my dash (ABS & Check Engine) for the simple reason that my BMW has custom items such as new exhaust line and oversized mags, etc.
It's NOT a matter of wheel diameter, but rather tire size/ circumference where ALL of the four tires mounted on the vehicle at any one time have the same number of revolutions per mile. It is that tire/ wheel revolution rate that the Wheel Speed Sensors are sending to the DSC, and if the rates do NOT match for all wheels, the DSC may set a fault code and the warning light appears. So questions become:...My wheels have the same diameter but not the OEM ones (should be 205/55R16) and in summer I have 19in and 17in in winter