Hi. In my Kadjar the problem has now been present 3 times:
Initially it was solved by lubricating the shock absorber top mount bearing.
2nd time the dealer told me that it was related to bad shock absorber top mount bearing and they replaced under warranty in December 2017.
Now in January 2019 the noise is back again.
Dealer will lubricate the mount bearing without cost for me. Let's hope this helps - again.....however I do not expect this to be a permanent solution. Seems to be a weak spot in the Kadjar.