Pulled the spark plugs - took a picture, but daughter is out with the camera.
No pictures to show.

What I saw - six spark plugs - all looking the same.
Ground Electrode - Whitish
Center Electrode - Edges rounded
Gap - twice as wide as it should be - should be .032 - .036
Black deposits near threads and "base'

Per the Haynes book - description of spark plugs - These plugs have "Carbon Deposits"

Then went to my logbook and saw that the spark plugs are 35K old, as is the air filter.

Actions taken: Readjusted the gap in the plugs (store closed or would have replaced) and replaced air filter - which I happened to have in stock.

I will report the results tomorrow.

__________________
Thanks for the help
Bill Fisher

'86 560SL (186K) - Now a 'classic' : Registered as an Historic Vehicle
02 E430 in the stable
'14 LS460 (Lexus)
- - - - -
'95 E420 (198K) found a new home
'99 E320 (80K) (gave it's life for me as we hit a bumper)
'95 E420 (231K) Sold to a happy buyer, new to Mercedes
'90 300E (65K) Sold to an Mercedes Lover
'92 190E (215K) - retired to the salvage yard
'93 500SEL (214K) - Moved to another family, still runs like a young pup