I just hit 50,000K's on the nav, and bled the clutch, mostly because I had some fluid left over from the gearbox (I think it's the gearbox) and I had taken the bash plates off so decided to do as much as possible.
I pretty much did all my fluids, but that's becasue I get em cheap. If you're worried, just do it, takes less than a liter and with 2 people is a 10 minute job