oh no, not one bit. i'm just saying, those who know ask for a pretty penny. those that don't will usually slap it on ebay and be shocked as to how much they can get for it.

Good luck to the OP! if you get nav, get MKIV or nothing. i really hope you are really crafty and willing to tear apart your interior. someone on bimmerfest in the E39 board did a OEM install (his screen name is KING). let me tell ya... doesn't look like a one day deal unless you've done it several times before.