Hi house, i need help with my audi a6 2002 . the radio light was on but no sound after washing the dashboard,then i pulled off the battery head the light went off and the radio died.please i need help.thanks.

SOURCE: radio code audi navigation

please i need to put the code in the radio all the tim is saff

SOURCE: AUDI A6 RADIO CODE

I just posted a solution for this problem. It comes straight from the radio manual. The dealer should have told you this. If you want him to do it he'll charge money for his time. IF YOU LOST YOUR CODE. THE DEALER CAN HELP YOU OR IF YOU HAVE YOUR 4 DIGIT CODE:

SOURCE: Safe code for audi A3 2001

TRY 4035

SOURCE: All dashboard lights off (even radio dim lights)

I AM A VOLVO MASTER TECH AND YES IT IS THE DIMMER SWITCH CIRCUIT

SOURCE: 2000 Buick Regal LS 3.6 - Flashing Dashboard Lights/Wont start

Most likely it is the ignition switch (the key ignition switch) in the steering column ($100 at a dealer).

It may be a loose negative battery ground cable, too.
Check the negative battery cable where it conencts to the engine ground. It may be loose, corroded, damaged, or otherwise not making a good ground contact.

Add a grounding strap ($11 - AutoZone) from the engine to the chassis. That may help, but it's most likely the ignition switch.