My xenon headlights on my 99 Audi A6 don't always

SOURCE: audi timing belt

It's a complicated job, and usually takes about 8 hours to do the full service if you're familiar with the car's mechanicals, you have a good array of tools (air tools help a lot), you're familiar with what you're doing, and with how to disassemble everything (including removing the front of the car - I'm not joking). There's more to the job than just the belt too - you need to replace the timing belt, timing tensioner, water pump, thermostat, serpentine belt, and serpentine tensioner. If your cam seals are leaking (which is also known to happen), you'd need those and plan for a couple more hours as well, due to the care that must be taken not to scratch or score the cam end caps.

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: how do i change time on clock on 2005 audi a6 quattro s line

I think I can help you. I just did this on mine yesterday because my clock runs a few minutes fast each month. It was somewhere bizarre - sorry I'm not near the car to be more clear. I think I picked Sound, Settings and for some odd reason, it was there, rather than in Car, Settings. NOOO - it was in Tuning - click the AM/FM button, then Settings. I've only had it for a few months, but you'd think I'd have that one figured out due to re-setting it.

-maria

SOURCE: 99' Audi A6 2.8 Q no brakes, low to no pedal pressure...

Not likely the ABS pump there is something wrong with the mechanical brakes it sounds like the emergency brake is not adjusted try adjusting the rear cable first then pull the emergency brake and push your foot on the brake if it is still to the floor you have a problem with a cylinder or a mechanical adjustment, if it's higher with the E brake on then you have the adjusters not set right and the cables not adjusted, So adjust the cables first. If the brakes are spongy with the engine off then it will need to be power bleed if that does not fix it then you may have the wrong brake shoes or pads on the car. Did you install the plates in the wheel rotor front braes? If not you lose 1/4 inch travel on the from pads, if the basic brakes are not right the ABS side is not going to be right so those problems have to be dealt with first. Also DO YOU HAVE A POWER ASSIST BOOSTER IF SO IT COULD BE BAD, TO TEST HAVE SOMEONE STEP ON THE BRAKE PEDAL AND PULL THE HOSE OFF THE BRAKE BOOSTER IT'S behind the master cylinder (sorry for the caps) if you don't here a suction sound when you remove the hose then you have a bad heck valve by the booster connected to the hose that plugs into the booster. if all of this is ok then it may be the ABS booster but normally its a bleeding problem. write a comment if this does not help or you need another lead,

SOURCE: abs and brake light is flashing on my 99 audi a6

If you need to repair the brake module, there is a fantastic article, complete with photos, at http://www.audiworld.com/tech/elec116.shtml

I followed this example for my '98 and now it works perfectly. I found a shop on eBay to rebuild my module (lifetime warranty) for under $200. It took me about 1 hour to pull it off and about 45 min to put it back on with minimum shop tools