what is coreect atf fluid for 420 sel and where does it get filled once drained
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1990 Mercedes-Benz 420SEL
Question: what is correct atf fluid
Answer #1dandd May 31, 2009, 14:28Master
Dextron ATF works just fine and you fill it in the dipstick tube.
Answer #2Visitor, March 15, 2010, 20:49
dextron or dex/merc3 ,$4 /quart as per my 20 year mechanic 1989-1990
ttomas2424 December 18, 2011, 12:13Enthusiast
The Correct Fluid for your German Made car Is Pentosin ATF 1. Made specifically for your car and lasted a long time between service intervals changes other fluids work but not as good. Electronic components such as Converter Clutches really respond to the Synthetic properties Of Pentosin ATF 1 No. A 0019892203. Info from My Mechanic In Germany. P.S. Can be purchased at your Local Parts house.