Contrary to the idea of a lifetime fluid it should be changed. Valvoline makes a fluid that meets the specs for our trans and you can look it up on their website. It is sold, believe it or not, at Walmart for around $4 a quart. Do a search on this forum and you will find plenty of discussion on the topic. You are over reacting. I don't know where you go info that the trans will slip after changing the fluid. Don't freak out. Do your homework and read the discussions and if you want to do it yourself go for it, if not find a good MB indy who knows what they are doing and ask them what they charge to do it and why fluid they would provide or, can you provide the fluid. Can't hurt to ask.
Last edited by dlbehrns; 11-10-2011 at 12:02 AM.