Eric's '90 80 quattro known issues list
=======================================
7/2019

Notes:
* This doc does NOT cover cosmetic/subjective issues, like paint & interior condition, rust, etc!
* Issues are listed in no particular order.
* Naturally this is only issues I'm aware of!  There could be problems I'm not aware of.

Issues:
* 7/2019: Engine has started consuming coolant with no observed leakage.  Bad head gasket suspected,
	gasket replaced, issue remains.  Probably crack in head?  Coolant stop-leak has helped but issue remains.

* Bulb-check circuit is present in relay box for headlights but not wired to dash.  Fixing is a matter of running
	one wire to the relay panel under the dash, just never got around to it.

* ABS does not shut off as it should when diffs are locked.  Need to wire a couple of diodes to diff lock indicator
	lights and connect to ABS relay.  Or just manually turn ABS off, or brake carefully, when diffs are locked.

* Left-rear power window does not work.

* All 4 door switches (for interior light) intermittently don't work, rears are worse.  Have new switches and rubber
	boots, just never got around to installing.

* Airbag light sometimes comes on.  Fault code is "intermittent power interruption", never could find cause.  Usually
	will stay off for weeks/months when reset.

* Low-fuel warning sometimes displays right after starting, even when there's plenty of fuel.  Fuel gauge has always
	been reliable.

* Trip-computer functions that require fuel information from engine ECU (like MPG, distance to empty) do not work.
	Megasquirt could probably be programmed to provide the right signal, just never got around to it.

* Transmission selector-shaft seal leaks a little.  Have a new one, just never got around to installing.