the 98/99 for sure does not have a replaceable filter. One is shown on many parts house parts lists oftentimes but is an error.

to my knowledge there isnt a drain plug either.

Would be surprised if the 96/97 had either one as well.

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)