I doubt that just the rear quarter window shades would offer enough side shading by themselves but they are not hard to retrofit and not too costly to do.
I have retrofitted my M5 with the power-sunshade option but without replacing the rear door panels as they were not available in leather at the time. However you can easily retro the small rear quarter window shades by swapping out the plastic frame around the rear side windows for one with a hook to catch the roll-out quarter window shade.
Those with 'stretched-out' quarter shades can easily swap out their old ones for new ones giving the car a fresher look from the side. Maybe I'll post this separately for power sunscreen owners.
Quarter glass roller-sunscreens are about $100 each.
Best of luck!
I have retrofitted my M5 with the power-sunshade option but without replacing the rear door panels as they were not available in leather at the time. However you can easily retro the small rear quarter window shades by swapping out the plastic frame around the rear side windows for one with a hook to catch the roll-out quarter window shade.
Those with 'stretched-out' quarter shades can easily swap out their old ones for new ones giving the car a fresher look from the side. Maybe I'll post this separately for power sunscreen owners.
Quarter glass roller-sunscreens are about $100 each.
Best of luck!
