I recently purchased this car (1993 400SEL)

I want to change the tranny fluid and filter, and I got some mixed opinions.

Some say do not change it after the car hits 100,000 miles. Unless you are sure it has been changed regularly.

I have 154K on this car and I have no maintenance records to check when it was changed.

The fluid does not look at all new and it also does not look at all severely used.

What to do?

And what is the best way to get the most of the fluid out on those cars and put in new fluid. Should I do it, or should I not touch it?

Thanks in advance

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1993 400SEL (W140) 281K
1999 S500 (W140) 163K (Sold)
2002 S500 (W220) 72K
1999 S500 (W140) 88K
You cannot simultaneously prevent and prepare for war.
Albert Einstein (1879 - 1955)