New to me L405 V6SC questions

[InformationSuperHighway]

Hey folks,

Just bought a 2018 facelifted L405 with the Petrol V6. I got it for a bit of a steal, but one owner, FLRSH, 70k miles and some kind of multi point inspection from the LR dealer before purchase.

I am going in eyes wide open and not expecting a brand new machine and it will have some issues, but.. it doesn't half make some noises on start up.

It seems to rev to 2k RPM and then drop after 20 seconds... internet says this is on purpose to get oil pressure up ASAP?

I'd also say it has a rattle at idle (Warm or cold) that doesn't increase under load.. it's just noticeable when I open the bonnet. Mixed reviews on this one, lots of people saying it's normal (Injectors / high pressure fuel rails?) others saying impending disaster with the chain.

Anyway.. does anyone have a video (Or could record one?) of a V6 Petrol cold start and idle so I can compare?

Also, there is a very very small coolant leak, so I have it booked in to take a look at that under warranty.

Thanks!