[s-cars] Upgrade existing ECU to MTM stage 3

[Twobro12 at aol.com]

<PRE>I current have the stock Audi S4 ('94) ECU, and was wondering about what
S4/S6 owners recommend and have tried. I want to know if I will have any
problems by upgrading the ECU, considering my car already has 90,000 miles,
or is an ECU upgrade a safe performance upgrade.  Please let me know anything
concerning the subject, as I am a beginner.  Thanks