What is the advisability of replacing the water pump on my 1999 ML 320 with 117K miles on it. It is not seeping but I have the shroud, and fan with clutch removed so I can change the bearing in the A/C clutch pulley. I found the idler pulley was noisy so I will change that too.

I just was thinking with the pump so easy to change with everything already apart I should go ahead and do it since the vehicle has over 100K on it.

Any advise?