I recently bought a cassette adapter to listen to programs downloaded via my IPOD. Since the 02 100 does not have a hardwired IPOD connection, I tried using an FM transmitter first, but this did not provide very good reception in the NYC Metro area (FM band too crowded). So next I picked up a cassette adapter, which plays whatever is on the IPOD via the cassette deck. As a result of this I am using my cassette deck a WHOLE LOT more than I ever did before, and am wondering if this could damage the heads of the tape deck? It does not seem likely since there is no tape moving, but it sure would be be a pain to have to replace the $5000+ navigation unit with attached tape deck.