Engine bay of Audi cars "80 L", "80 GL", "80 GLS": 1 — radiator; 2 - windshield washer reservoir; 3 - oil filter; 4 - generator; 5 - air filter; 6 — vacuum receiver; 7 — battery; 8 — ignition coil; 9 — ignition distributor sensor; 10 - fuel pump; 11 - fuel filter; 12 — thermostat; 13 — oil filler plug.
(A link to the original source is available on the website AudiManual.ru)