I have read that SLS fluid/filter change is advisable for W123, W124 wagons, but it is necessary on my 1999 E320 wagon? Have any of you with 210s performed this procedure? What were the results? Thanks!

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1982 300D-T (sold)
1988 300E (sold)
1994 E320 Wagon (sold)
1995 E320
1998 E300D-T
1999 E3204M Wagon
2001 E320
2005 E320 CDI