The thought is that TSB was Benz attempt to cover their ass with the TSB issue...
I would leave the bottom pan off, add some oil and run the car up to temp, even bringing the rpms up for a few min... then I would put cardboard on the ground under the engine overnight...carboard shows an oil leak right up nicely. That will give a good indiction as to the location. Traveling with the car tells nothing b/c of the airflow effectively transferring the oil.....

I have seen many 104s that leak with a full dipstick and they stop with the lower level directions of the TSB. iIrun mine at 1/2 always, even tho I have changed the head gasket many miles ago. They refuse to go into detail on the WHY of the TSB, but it was something b/c there were 2 more follow up ones....and the final one was the their directions of how to check the dipstick [ which I posted]

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A Dalton