I purchased the shop tool (dipstick part # 140-589-15-21) used to measure the ATF level in the 5-speed electronic transmission on my 1999 S600. Of course it came without directions, so:

1. How far is the dipstick to be inserted in the tube? I assumed it is until touches the bottom of the pan, but maybe something else?

2. Do you measure the level hot or cold and with the engine running or off? Previous experience says hot and running, but I would like confirmation.

Anyone have access to the MB instructions on how to use this tool?

TIA

Insert until it bottoms out in the pan.

Level is measured with the car running and in gear. You need to warm the trans up to the correct temperature and check the temp using a HHT or star diagnostic software. If you don't have access to one of those, a infrared thermometer taking a reading of the transmission pan should get the temperature pretty close. I believe level is usually checked at 80C.

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Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record