ok they go grey and i can´t use them. do they go away or stay like that? and if i put this MK4 in my car does it see that i have tv and dsp?

Yes, they will go grey then disappear.

The mk4 will work the same (in reverse), when you plug it in, it will not find the TV and DSP until it does a full system probe, this could take up to 15 minutes, but they should be found, and be selectable in a short time.

thanks, you are right. love the MK4, map is smooth and it responds faster:thumbup:

directions for upgrade:

http://www.bimmernav.com/BMW_E39_5_s...tallation.html

Dan, that guide is for doing a mk2 to a mk4, mk3 to mk4 is way eaiser than that.

Remove trim,
Insert radio removal tools (or 2 small screw drivers)
Remove drive (slowly)
Unplug the 2 coloured connectors then, unplug the push on GPS antenna
Swap mk3 for mk4
Reconnect coloured plugs and push on GPS antenna
Push (slowly) the mk4 back into slot
Replace trim.

I did mine in less than 15 minutes.

I did not disconnect the battery but followed the mk3 shutdown procedure, and had no problems.