Car radio telephone (BMW 5 Series E28)

According to the BMW instructions, when additionally installing a radio telephone, in order to ensure a reserve of electrical energy, a second battery of the appropriate capacity should be installed with a relay that disconnects it from the vehicle's electrical circuit. BMW service specialists will be happy to advise you on this matter.

Important recommendation:

Application of mobile communication systems (car radiotelephone, radio devices, etc.), not intended for use in your vehicle may cause interference. BMW is unable to control each product and therefore does not bear any liability.

In this regard, before purchasing such a system, we recommend that you seek advice from a BMW service center.

To ensure reliable operation of your BMW, do not install any mobile phones or other communication equipment whose antenna must be located inside the passenger compartment.