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-   -   88' 420 SEL trans. fluid change (http://www.peachparts.com/shopforum/tech-help/5275-88-420-sel-trans-fluid-change.html)

Jim Collins 09-11-1999 10:27 AM

Manual says to change trans. fluid every 15K. It's time. Where is the drain plug? Or do I have to remove the pan? I have a Chilton manual that refers to the torque converter plug. Is this the tranny dain plug?

Turbo 09-11-1999 12:55 PM

The trans pan has a drain plug which requires a 5mm allen wrench to remove it. After the fluid is drained, remove the 6 13mm head bolts and remove the pan. Teh filter is secured with 3 phillips screws. be sure to get the srews started straight as they go into aluminum. Do not over tighten the pan after gasket replacement either. The torque converter also has a drain plug in it. The torque converter can be rotated in the direction of engine travel (clock-wise from the front) until the plug is visible through the opening in the bottom of the trans bell housing. Use the same 5mm allen to remove the plug. The torque converter plug is black. Replace the aluminum crush seals with new ones and again, do not overtighten.
Fill with 3 qts ATF and start and enguage drive and reverse. Then add 3 more qts. Enguage again and check and correct fluid level depending on trans temp.
Good luck
turbo herb

Benzmac 09-12-1999 09:18 PM

The manual says every 30k for the trans I think. Look at the top of the page in the maintenance booklet, I think it will say "additional work to be performed every 30K miles".

Ps we carry the parts in the partsshop
Thanks

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Benzmac:
1987 16V
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM



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