I dont think so. My 1995 A6 quatrro is sans remote entry and I've noticed that same year A6s have a "receiver" for the signal on the B pillar (between the front and rear passenger door)s. That "receiver would somehow have to be added and wired into the rest of the locking system. Seems like a factory job to me.
Quatro por Quatro was created in 1994.
I quatro rusteghi was created in 1906.
Éramos Quatro was created in 2001.
Morra Quatro has written: 'Believe'
Quatro - album - was created in 1974-10.
Quatro quince.
As Quatro Estações was created on -19-10-08.
The cast of Quatro Vezes Quatro - O Triunfo da Forma - 2001 includes: Pedro Efe Alexandra Lencastre
Susan "Suzi" Quatro is 67 years old (birthdate: June 3, 1950).
Patti Quatro's birth name is Patricia Quatrocchio.
As Quatro Estações ao Vivo was created in 1990.
Quatro de Setembro Theater was created in 1894.