Piston Cleaning, Rear Fogs, Telephone Speaker & 1 Correction

[Traurig, Scott R]

I second Huw's link (http://www.humanspeakers.com/audi/tricks.htm#flush).
I've used Mopar Combustion Chamber Cleaner (MCCC) and it works great. Use a
lot. Soak overnight. Make sure you get almost all of it out prior to putting
the plugs back in and running the engine because you don't want to
hydraulically lock your pistons and valves. For cars with deep plug wells
like the Audi you can siphon it out of each cylinder with a piece of hose,
then crank the engine to spray the rest out of the open plug holes. Run the
car, then change your oil and plugs. It's available at any Chrysler dealer
(that might be the only place you can get it).

I hereby promise to never use my rear fog light except in fog :) The funny
thing is, when I purchased the car I thought "rear fog, big deal", but 2
days after I had it we had pea soup fog here and I felt much safer with it
on. I did remember to turn it off :)

Ti: thanks a bunch for looking into the nav/telephone audio thing. I do see
the extra speaker in my driver's door, but I'll be damned if I can find it
in my factory electrical manual (my factory service manual won't be here
until next week). All of the schematics show the phone and nav systems only
attached to the radio, and no where that I can find is a connection to that
door speaker, not even on the radio schematic. Is that speaker wired to the
radio as a separate channel, or is it wired to attach to the telephone unit?
Any additional info. you have would be much appreciated. Also, does anyone
know what the signaling standards are for the radio to telephone/nav
interface, i.e. the correct audio voltage levels, and the mute line levels
(bet it's ground to mute or some simple thing)?

Correction: the link to the diagnostic connector to RS-232 converter I gave
should have been www.opendiag.org.

Scott
98.5 A4 1.8TQ