I use a slightly different chemical - something called KrudKutter (available at Target). Here's my process...

- Wet your warmed engine down by lightly misting it with a hose
- Lightly spray on some KrudKutter
- Gently agitate it into whatever surface dirt there is with a very soft brush (I have have a long bristled wheel brush that works beautifully)
- Go lightly and and don't brush too hard - you shouldn't need to
- Let it soak for a few minutes
- Rinse the engine by misting it with a hose (don't use a strong jet of spray - it will force water into places you don't want it)
- If the dirt/grease doesn't come off easily, allow more time for the KrudKutter to do its thing
- Finish up with 303 Aerospace Protectant on all plastic parts - this is a step you don't want to leave out

Takes about 15 minutes once you get the hang of it and only needs to be done once a month or so to keep your engine looking like new.

MODS/UPGRADES:
17x8" BBS RKs (great AW story about how I got them...) | H-sport anti-sway bars | ToyGuy short shifter |
IceLink/iPod integration | Escort 8500 hardwire | fog/running light rewire | HomeLink home lighting control |
fold-down bag hooks in the trunk | aux power socket under the armrest | hidden Symphony EQ settings |
remote locking control recode | debadged

SUGGESTED READING FOR C5 A6 OWNERS:
2001 A6 info from AudiWorld | 2001 A6 info from Edmunds.com |
Audi 2001 maintenance schedule | Stoney's links (the ultimate A6 links page) |
the nOOb's guide to everything | how to make your car shine

The other ride: 1998 Mitsubishi Montero (typically with a kayak on top)