you can ' refurbish ' them to a certain degree, a good clean will help a lot
after cleaning mine, then replacing with a used one and still having trouble, i bit the bullet and bought a proper one from jaguar them selves
and have had trouble free V12 motoring since
sometime you just got to jump in with both feet..
1994 3.2S in Morocco red and Doeskin/Ruby red interior
1989 V12 XJS White with Mulberry interior
2004 2.1 X-Type Platinum with Champagne Leather interior
1999 V8 Sovereign in Seafrost with Oatmeal and Antelope interior