Audi a4 for sale

Description:

Audi A4 Avant SE TDI diesel Estate
multitronic 7 speed auto gearbox

6 months mot with just two advisories

1..number plate bulb
2..exhaust deterioated but not blowing

New front brake pads
New front brake discs
New front calipers
New driveshafts. plus one new spare one
New rear brake pipe
Cambelt changed 2 years ago
Had all the oil/fuel and air filters replaced

After fixing rubbing noise hasn't gone away,suspected diff on way out but not slipping in any gear.
Mileage will go up as using every other day
Spares or repair £900
Dont really want to sell it as its been a good motor. Any advice what it might be just message me