Can anyone tell me the outside diameter of the coolant drain nipple on a 94 M104? I want to attach a hose to it when draining the engine's coolant to try to prevent a mess.
regards,
Mark

I'm not intimately familiar with a 104 motor, but in many respects , it's just a 103 with an extra cam. That said, I bet a buck your drain plug is the same as mine.

I use std. size heater hose to connect to the nipple.

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'91 300-SEL

i'd guess 3/8 - 1/2" nipple, drive your car to home depot or other hardware stoer, measure the nipple (its just under the bumper) and get the correct size tubing.

1/2" heater hose works well.
Dan

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2012 E350 Bluetech

Thanks forp,
1/2" for the radiator and the block?
regards,
Mark

Yes, yes.

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2012 E350 Bluetech