Many car radios have facilities to search for the strongest radio signals.
Avoid using this feature when travelling through hilly terrain or valleys as the radio will often miss the best transmitter for the area. Instead use this search feature when on the top of the next rise or hill. The metal bodywork of a vehicle prevents signals reaching the radio, so a quality external aerial is needed for good reception. FM Radio reception can be difficult when travelling in built-up areas or in undulating terrain and multipathing or a weak signal may be experienced. However, FM radio generally gives good results with quality sound and the option for stereo reception.