How critical is automatic transmission linkage bushing?



My SA told me, it was a non emergency repair and could be dealt with at some later time.
I quickly searched up google, and seems, the part is really cheap ($1.50 or so). Has anyone tried to replace this? How hard is a DIY on this?



Seems like it requires getting underneath the car - I'll just leave for the mechanic, next time it goes in for any work
If some one has any pictures, that would of immense help though..
http://www.mercedesshop.com/shopforu...light=W126+DIY



