Going back to the post about Pentosin, they make a pink "G12" coolant for VW/Audi that's supposed to be incompatible with other coolants. VW makes a big deal of making sure you don't mix anything else with it. If you get the Pentosin, don't get the pink stuff!

I ran Prestone extended life (Dexcool type, bright orange) for a couple years in my ML with no adverse effects. However at the next coolant change I used Zerex G-05 (pretty much clear in color) because it meets the factory specs. I don't think it was $9 per gallon.

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Lenny

There are only three sports: bullfighting, motor racing and mountaineering; all the rest are merely games. --Ernest Hemingway

'10 GL550/'04 BMW 545/'99 BMW 323/'98 ML320/'87 VW GTI (race)