The car is a 1998 E320 with about 55k miles on the odometer. The tranny fluid has never been changed from my knowledge. The tranny seems to slam when i come to a stop. Its usually from 3rd to 2nd gear. Its feels like I have been rear ended. Its doesnt happen when the car is cold only when I drive it for a while. Upshift are smooth but slow sometimes to shift out of 1st in the morning. I took it to the dealer and they told me I need a new tranny at over $4k. Is this right? Thanks a million.