Clutch - master? and slave?

[Britt Crowell]

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My Audi 1988 5000 TQ had the clutch petal stay on the floor today.
The clutch wont disengage. (woo hoo i was close to home)
When you pull the the petal up it will stay up, but if you tap it a little it will go on its own all the way to the floor.
So with 4 audis I've never have a master/slave clutch problem before.
Which one is it?
Should i just do both?
Best (cheapest) place to get the parts.
Thanks

Britt Crowell
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