Dan:

Last year I performed what some would call an ign. system maint. tune-up.

Plugs, wires, dist. cap; rotor(all OEM) were replaced. Before and after this service, the car exhibited a slightly rough idle when cold. This was a new situation at the time - car had always idled smoothly when both cold and hot, except for a total melt down that was repaired with a new MAS(FPR went south) and intermittent stalling that was solved with a new OVP.

I went ahead and did the "throw parts" approach simply because I had owned the car for 8 yrs. and knew the ign. system stuff could probably use a refreshing.

Cold, semi-rough idle continued after the ign. system work, so I took the snake oil approach with the 44K. Was lured in by all of the "miracle claims". The 44k did not resolve the semi-rough, cold idle problem, so I thought I'd give it another go, only this time using the Berryman's simply because I had a new can of it laying around and it was MUCH less costly than the over-priced 44K.

Your point is quite valid...why not test spray pattern and I'll do that a tank or two down the road. For now, I'm trying to line up repair facilities that do CIS/FI cleaning(and do it WELL) in the event their service is needed.

Thanks for your reply.

__________________
Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"