If it needs to be fixed fix it... But if
you just want to service it think twice. They messed up my 2005 CL500 that I bought brand new in 2004. They "recomended" trany service and I said sure why not... After picking up the car and driving it on the interstate, it started to smoke and slip.... And then what, there goes my $114,000 Benz. Those fluids are made to last a lifetime... If there is no problem with them... Don't touch it, they will just make it worse.