Does my new , 2018 Mini Convertible have a true glass
rear window or is it some form of plastic? Not sure if I
should clean it with a glass cleaner or a plastic cleaner?

 

My Gen1 is glass, would not think a BWM/MINI would have anything other than glass.

 

thanks.

 

Nothing better than taking some twisties with the top down. I actually prefer more when it is overcast. Driving from full sun into shaded trees areas is hampered by not tin top to keep the sun out from the top of the sunglasses.

 

I would have thought that, with regard to the 2-dr Hard-Tops,
they would have (by now) come up with a modified design
that could allow the rear side windows to go up and down, and
maybe even the window on the hatch. Then, with the roof being
able to open, hatchback owners could get closer to the feel of a
fully open convertible while still being able to close it all up when
necessary.
P.S. - Too bad my mechanic friend's son took a job in the future
design department at Ford. If he worked for Mini, I could try to
plant some inspiration in his head.

 

Its glass, all 3 gens of MINIs from 2005+ convertibles have glass. Dont put the top down when dirty, it can etch the glass over time. I have 276K on my R5 and it still looks good.

 

Will definitely make sure the rear glass is clean before
lowering the top. Thanks.