At October 2009 prices range between £170 £190 from Audi dealers.
There does not seem to be a cheap way around this!!
You can refer to the user manual if you want to reprogramme Audi A4 key.
get spare key
How much does it cost for a new starter on a 2000 audi a4 1.8t not quattro?
There is no such thing called a TONGUE converter
The 2010 Audi A4's engine produces 258 ft-lbs. @ 1500 rpm.
The 2009 Audi A4's engine produces 258 ft-lbs. @ 1500 rpm.
The 2001 Audi A4's engine produces 166 ft-lbs. @ 1950 rpm.
The 2005 Audi A4's engine produces 166 ft-lbs. @ 1950 rpm.
The 2011 Audi A4's engine produces 258 ft-lbs. @ 1500 rpm.
The 2006 Audi A4's engine produces 207 ft-lbs. @ 1800 rpm.
The 2002 Audi A4's engine produces 166 ft-lbs. @ 1950 rpm.
The 2012 Audi A4's engine produces 258 ft-lbs. @ 1500 rpm.