Hello again Mercediacs!

I am still here in Seattle and I am still driving my 1986 190e.  It's
got about 132K miles on the odometer now,  and has been performing
flawlessly for me since I got it when my wife was pregnant (our
daughter is 3 now!). I did do a bunch of work on it when I first got it
including the serpentine belt tensioner, and other front of engine
accessories.

I recently did experience a failure of the central locking system,
which fixed itself when I took the vacuum pump apart (under the rear
seat passenger side). Don't really know if this was just a loose
connector?

1)  So,  is there a general issue with the vacuum pump that cause is to
fail?  Are there several common scenarios?

2) Where is the illumination for the gear selector read out?  This has
never worked.

3) The reserve fuel lamp has never lit for me?  Is this usually a bulb?
If so,  how to get it?

I am sure I had other questions, but for now... This would help.

Thanks and I hope you are all doing well?  are you all still here? Did
Mcbrue get a Lexus?