Hi Mutt,
If the timing was at 5 BTDC and you moved it to TDC...your going the wrong way. Try for 10 deg BTDC at idle. The engine can handle loads more advance. Give it a try...
Regards,
Randy D.

I forgot to ask if you had checked the "mechanical" advance as Benzmac suggested.

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W.R.Durrance
ASE Master Tech
Mercedes Tech 20 Years
68 250SE
68 SAAB 96 Ice Racer
69 300SEL 6.3
70 300SEL 3.5
81 300TDT

[This message has been edited by WDurrance (edited 10-01-2000).]