When a throttle body gets replaced, there are a few rubber hoses that usually get replaced (because they're usually brittle and break). It is also easy to break the plastic vacuum tubing in that area. On my E420 (also an M119), I had the fuel pressure regulator dripping a little - might want to check yours, since you're there. (it's on the U shaped Stainless steel fuel tube, near the driver - a search for the part reveals a picture to go by) After running for a minute, shut it off, pull off the tube, and wait a minute or two, if you do not notice any wetness/fuel at first. If it stays dry even after a few minutes, you can cross that item off your list of possible culprits.

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It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein


09 Jetta TDI
1985 300D