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Originally Posted by fares52
This thread is great but for those of us with Combox's its still a little unclear. To be honest I'm still not sure what the difference is between an Ulf, a Mulf, a TCU and a Combox.
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Ulf and MULF are the same thing (someone correct me if that's wrong). At least, both get tossed around on here meaning the same thing. Perhaps a version difference. Anyway, that box handles USB and Bluetooth. The TCU handles telematics, IE cell data connection. It's used for BMW assist (which needs a constant internet connection to handle SOS and the iPhone app). The confusing bit is that it also handles Bluetooth, but I believe not USB (so with a TCU, you can have bluetooth without 6FL). The COMBOX replaces all them with one thing on newer cars. It handles cell data if you're subscribed to BMW assist or connected drive and it also handles bluetooth (and includes A2DP stereo streaming, unlike the MULF or TCU).