My 2000 SLS has 170,000 miles and unless the previous owner changed the transmission fluid before I got it 3 years ago with 40,000 miles on it then it has never been changed. It runs great but it has been bothering me for a while as I have been thinking I should change it. I really don't trust transmission shops, I know that most jobs like fluid changes are usually given to the apprentice or green mechanics. Is it worth taking to the dealer? Are they likely to try to suck it out and replace or should I ask for them to drop the pan and clean the screen? Any advice? Thanks