Plug connections at the rear in the engine compartment: 1 - lambda probe heating (right probe); 2 - to the ignition coil (supply wiring); 3 — for the lambda probe signal (right probe; the plug connection is located at the back of the holder); 4 - for detonation ignition sensor I; 5 — for the engine shaft speed sensor; 6 — for the ignition timing sensor.
Plug connections at the rear left in the engine compartment: 1 - for the lambda probe signal (left lambda probe); 2 - lambda probe heating (left probe); 3 - knock sensor II.
Injection nozzles (white arrows) can only be removed together with the fuel distributor. To do this, loosen the fuel distributor mounting bolts (black arrows).
(The original version is on the portal Audimanual.ru)