How can i tell if the i c u unit is not working on a Audi A6

SOURCE: fuse box in a audi a6 1995

Fuses are located by the side of the dash board when you open the driver's door. The fuel pump fuse is situated in there.

SOURCE: AUDI A6 WINDOW PROBLEMS

This is a common problem with the C5 A6 models. Before you replace the fuse for the windows (I think it's number 14, but i don't have a manual in front of me - Anyway, it's the 10A fuse that's blown!) Look under the back of both front seats and you'll see a light that illuminates the floor for the back seats. Rem ove the light from each seat by prying it out with a flat screwdriver and disconnect both leads. Replace the fuse, and your windows (moon roof and interior lights as well) should now work. The lumbar support causes something to short out the lights. I've tried insulating the lights on mine, but the problem always comes back so I just disconnected them altogether.

SOURCE: computer signs on audi a6?

what part of Instrument cluster panel would you like to know ? Warning lamps ? on-board computer ? auto check system ? I have a simple manual that came with my audi so if its in this book then i could answer your questions :D

SOURCE: Turn signals not working audi a6 2002

turn signal switch most likely. But it could have a faulty flasher relay. the signals and the hazards probably have seperate flasher relays and possibly on different circuits so check fuses as well

SOURCE: my 1996 audi A6 has an oil sending unit problem......

The oil pressure sender unit is located on the oil filter housing.These do tend to leak at times. The warning light for this switch is a red oil can and a buzzer. Replace the switch. If warning light still comes on, have the oil pressure checked. The oil level sender warning light is an orange oil can with oil level under it. This sender is fitted on the bottom of the oil sump and can leak past the seal. If warning light comes on, check oil level. If ok, check for damage to wiring under vehicle. Senders do some times become faulty.