I have a 96 Audi A6 Quattro. the "Brake Light" warning light comes on intermittently. I have checked and all the running lights and brake lights are working. I have about 3 or 4 of the small lights out in the rear window center brake light. Would this cause the warning light to come on? I didn't think it would since several of these little bulbs have been out for awhile. Any ideas? Are there codes that will tell me what is happening?

Thanks,
Dave