Check the listing for details. For BMW 1er E81 E82 E87 E88 Can-Bus Car Radio Adapter Steering Wheel Cable Iso. Condition: New, Made in Germany. Listed at 132.16 USD. Since in the vehicles listed below the permanent+ line in the vehicle is approx. 30 minutes after the vehicle is switched off, an aftermarket radio loses its saved settings. Therefore the permanent+ cable on the adapter is loose and must be routed to the fuse box and connected there with a sufficient permanent+ cable. ...your partner for car audio, multimedia, navigation, alarm systems and positioning systems. We have been one of the leading specialist retailers in Upper Franconia since 1995. With our large product selection and many years of experience, we will work with you to find the optimal system for your vehicle. In our specialist workshop, we install all devices in your car or classic car, commercial vehicle or motorhome - promptly and in a budget-friendly manner. See for yourself!.