My battery recently died so I replaced it.

I also replaced my spark plugs with Bosch spark plugs and OE wires but my Audi still vibrates on idle. What else could be causing this?

i would like to know the same thing
so please help us
sorry for the semi thread jack

I've heard the idle control valve usually gets clogged up. You could try cleaning it up.

Also did you try throttle control adaptation? Leave your car on (with engine off) for 3 minutes, you'll hear some noises thats when you know its happening.

what do you mean vibrates? does your idle jump around or is the needle steady? could be worn motor or transmission mounts.

If the idle isn't steady it could be a bad secondary air pump.