Transmission on 1989 420 SEL

[Cigar Havana]

I sucked some ATF fluid out my 1989 420 SEL (230,000 KM), after only 14,000 KM and it looks a cloudy red, not like new ATF, so I think it is best to change it. Anybody know why it is getting so cloudy so quickly?

Also, I notice that when in 'D' traveling about 50 KHP, on a slight downhill, if I take my foot off the gas, the engine seems to slowdown the car. If I shift it into neutral, the car coasts faster. Is this normal, or is this a symptom of some other problem?