Preventative maintenance never hurts. If you use the search function, you will find the issue of replacing the fluid in the 722.6 tranny has been discussed a lot of times. Service with only the approved MB fluid and make sure whoever changes the fluid is up to speed on making sure the fluid level is correct in the tranny.

__________________
Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record