I remember that from your work on Blitzen. Have a flex shaft pen light and small telescoping mirror that i stole from guitar tools stash that are just perfect for that stuff. Also, before i started on the chain, i had the fuel distributor off and did not renew the o-ring, so i will do that too.
Have new injectors, holders and air supply lines on the shelf, with all the work on the top of the engine, the old brittle parts may have been dislodged so there's another avenue. Finally, i have a slight tap on the left side of the engine--exhaust valve bent?? I sure hope not.

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Earl McLain
'02 C230 Kompressor
'89 560 SEL "Frau BlueCar" (retired April 2004)