Hi

I've searched but I can't find a definate answer. The Vehicle I have (E46 MY1999) is fitted with the 17 pin audio connector, 1 DIN navigation and steering wheel buttons which all use the K Bus. This is the "lowline" setup that was replaced with an I and K bus after 2001 with the flat pin quadlock system.

The TCU I have is a 2004 model which uses the I Bus (it says this on the label).

1) Can I connect the TCU to the K Bus? They appear to use the same protocol but with an extended command set in the I Bus.

2) Will I get the caller ID on the K Bus navigation unit? I have a MK3 GPS computer.

3) Will my K Bus wheel buttons work with the I Bus TCU?

or

4) Do I need to change to a later LCZ with an I bus/K bus gateway function?

Thanks for any assistance