Arthur, thank you once again.

The documents on the W202 CD carry the WIS naming convention, so 03-3420 is something like AR03.30-P-1600C (which happens to be the procedure for the M111).

I have checked every PDF on the CD and can't find the M104.

I am surprised by the 400Nm. My M103 paper manual calls for 300Nm and with the M104 being an evolution of the M103 I thought it would be pretty close. The M111 is also 300Nm. The M112/113 isn't a good reference because they call for a combination of 200Nm followed by 95 degrees of further rotation. Anyway, it shows that assuming something can be dangerous.

I am going to have to borrow a torque wrench to do this one. My Snap-On 1/2" drive tops out at 338Nm.