Trans fluid change is a really simple DIY job.
Easily under $100 for everything.
Dexron 2 fluid is replaced by Dexron VI.

__________________
Phil

Prior cars:
1971 250
1983 380SEL
1986 190E2.3
1987 300TD
1994 SL500
2001 E320 4Matic
2003 SL500