I have added too much transmission fluid in my 300SDL. It is about 1/2 inch over the high mark. Will It hurt anything? IF yes, is there a drain plug i can unscrew to release the excess? Thanks

Take the excess oil out.
Too much oil would cause the oil to foam, drastically reducing lubricity to a point it could cause damage.

Thanks for your reply. Is this something i can do? Is there a drain plug on the transmission?

drain plug is a 5mm allen hex and is on the bottom of the 6-bolt tranny pan

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Don't ask me, I'm a shop-owner by default

Thank you for your assistance

i'd just suck it out with a vinyl tubing from the filler tube.

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joel

Prayers bring forth enlightenment.

Hi everyone. I too just overfilled my trans last night, though not by as much. When running hot after driving briskly for 10 minutes, it is about 1 or 2 mm over the high mark (just barely over the mark). Is this enough of a difference for me to worry about? Thanks for your help.

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08 W251 R350
97 W210 E320
91 W124 300E
86 W126 560SEL
85 W126 380SE Silver
85 W126 380SE Cranberry
79 W123 250
78 W123 280E
75 W114 280

Anyone know what the amount of fluid is to go from the low to full marks on the shop dipstick for the 722 series transmission?

Cheers,
Steve

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97 S500 Coupe 139Kmi.
92 300CE 150Kmi. Sold
89 F250 Diesel 220Kmi. Dead
98 GMC 1500 160K.

My book says "Distance between MIN and MAX mark on dipstick is approx 0.3 liters ( 10 oz. ) of transmission fluid"