An interface and corresponding method, where the interface is connected via a first connection to a factory data bus of a vehicle which transports signals according to a first data format, and further connected via a second connection to {HEAD ~ a data channel} of {TAIL ~ the aftermarket component} which transports signals according to a second data format 
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An interface and corresponding method , where the interface is connected via a first connection to a factory data bus of a vehicle which transports signals according to a first data format , and further connected via a second connection to { HEAD ~ a data channel } of { TAIL ~ the aftermarket component } which transports signals according to a second data format
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