That's b.s. My bottle of Mobil 1 ATF says that it meets the particular 236.x specs that MB calls for our automatic transmissions.

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

Dont shoot the messenger i am just saying someone here posted that the new recipe for mobil 1 atf is not a propper form of dextron 3 anymore.
I personally have 2 cars with the new formula of mobil 1 in my cars right now, with no problems.

I wasn't attacking you. I was just pointing out that Mobil 1 ATF still meets the specs despite what others may say.

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

I do remember one problem I had with a 190d ,an auto 1988 2.5 car that Id bought with an existing problem.The car wouldnt go into 3rd & 4th until it was warmed up.Id drive the feeder roads for some 3 miles then make for the freeway. After 3 changes of fluid and filters within the 1st 3 months it finally cleared up .A long non service had put a varnish inside the trannie.

My 1987 300d is stuck on 1st gear, it does seem to shift but then when i dont think its actually changing gears, very high rmp's, i have done 2 changes of fluid and filter in the past 4 weeks, the oil has been blackish both times.i may be out of luck

Ditto, even for synthetic.

For maximum life it should be changed 20k for dino and 35k for syn. Sooner if you do a lot of city driving.

Black fluid is a bad sign.
The ATSG book gives one posible cause as the bellville washer of the K-1, clutch rubs against the planetary-gear carrier of the front planetary.
Trans rebuild or replacement maybe in your future !!

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Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving