I think your car has the synthetic transmission fluid. Two schools of thought on it. 1. Have a dealer look at it and make a judgment on whether it is dirty enough to change, 100,000 seems to be the cut off for original fluid. 2. Tell the dealer to change it and all associated filters right now. The service is about $200 but I don't know if it is a DIY job or not. Personally I wouldn't do it myself because it is done so infrequently and I wouldn't want to chance anything.