Wow, a car stereo with a large display like that is surprisingly advanced for 1985! I wonder if this is really a CRT, or a multi-segment display made to look like one
It's a segmented display. Color display on consumer computers was to expensive at the time. because of the limited memory you could either have high resolution or few colors and low resolution, and high resolution was required if you need text.
My guess is that all displays have fixed segments and warning lights that can only be turned on or of.
Nissan loved to cram technology in their cars. See for example the GTR-34 in the 90s that has a full size LCD and real-time readouts on it, which was very usfule to tuners, hence it's prominence in the scene
To me, it has the fuzzy look of a low res mid 80s CRT monitor. It doesn't look like a VFD (Vacuum Fluorescent Display) to me, though I am pretty sure the clock may be one.