sentences:  Like the 6210 and 6310, the 6310i was optionally included on several Mercedes-Benz cars.A cradle was installed in the dashboard, into which the phone was securely placed.Connectors in the cradle provided the phone with electrical power, routed the audio path through the car's audio system, and an external antenna mounted on the car's chassis replaced the internal antenna, providing a stronger signal and better signal-to-noise ratio.