BMW Business RDS Radio installation guide and user manual

Instead of a metal mounting cage, this radio is secured using two M2.5 Allen-head bolts with sliding metal tabs (a T10 Torx can also be used). When turned clockwise, the tabs engage and pull the radio inward, clamping it firmly against the surrounding radio frame:

Don’t over-tighten them otherwise these small retaining washers at the other end of the bolts will fly off.

The covers, that hide the bolts are very fragile and must be treated carefully. If the small plastic locking tabs are still intact, open the cover by first pushing it outward and then pulling it toward you. Use only a fingernail — tools such as knives or screwdrivers will scratch or damage the plastic. To close the cover, follow the same steps in reverse order.

Do not pull the radio out by these covers, as they will break off. Instead, insert your finger through the cassette door opening and pull the radio out from there:

Operating Instructions: