Can ayone help please help me. Have a constant knocking from rear of car, have been advised it sounds like rear damper upper bushes. Sopke to local Jag dealer parts guy and even with dealer sale details and VIN they couldn't be sure what I need. VIN is JFALD3AJ 697506 car has 420 suspension as a feature. Dealer spares guy asked it it had self levelling, I am sure from reading on here it hasn't but cannot be 100% sure.
Appreciate any input.

Thanks

Jimbo