Microcat just makes it even more confusing......
RH rear light lenses up to VIN XA430701 is AMR4100 which has the amber indicators
RH rear light lenses up to VIN XA430701 NAS spec is AMR4102 which also has the amber indicators (and from pictures looks identical to AMR4100)
RH rear light lenses from VIN YA430702 is XFB101720 which has the clear/grey indicators
RH rear light lenses up to VIN YA430702 NAS spec is XFB101740 which also has the clear/grey indicators (and from pictures looks identical to XFB101720)
So quite why an NAS spec car would have different light units, that look identical to the rest of world spec cars, I have absolutely no idea. Maybe the difference is in the bulb holders on the back or maybe the NAS ones don't have the built in reflector?
I gave up trying to work out the logic of car manufacturers long ago. As an example, an EU spec car must have a high intensity rear fog light that can be a single one on the offside (RH side on a UK car) or in the centre, or a matched pair on either side. A LHD Mercedes (and Porsche and probably a few others too) has one on the LH side (offside for a LHD car) but the cluster fitted on the RHS of the car doesn't have the LEDs fitted inside it. So by fitting the cluster for a RHD car to the RH side of a LHD car, you get the matched pair. So rather than making a LH and a RH cluster, they make ones with and without the LEDs fitted so there's 4 different parts when 2 would do the job.