[BjG500]

Have anyone replaced the wiper shafts on a 2004 or newer? My 04 is loos after twice tightening. I need to know ways to access the back of the shafts to properly repair them. Some say the dash board has to be removed.

Thanks

 

[grazza]

on older G's (w460) you can get to them by removing the glove box and instrument cluster.
no idea about w463.

 

[AlanMcR]

I would guess that the problem is a lack of lubrication between around the rotating part of the shaft. If it isn't fully seized, you might be able to save yourself a lot of work.
If I remember correctly, there is a circlip that prevents the shaft from sliding into the dash from outside. If you pop the circlip (don't let it get away, they fly far), you should be able to move the shaft in and out allowing grease to work it's way into the gap.

 

[GTO71]

Try Pulling off the Wiper arm first

It could be a simple fix and prob is. Pull off the wiper arm and it could be that just the bolt holding the wiper spindle to the cowl has gotten loose. He is a amateur write up and I think it could solve your problem I hope.

http://www.benzworld.org/forums/g-class/2078794-wiper-spindle-repair-under-5-bucks.html