SOURCE: audi a4 quatro radio is in safe mode. I have the
IMPORTANT NOTE: You must have the security anti-theft code for your Audi radio from the car manufacturer, or from an Audi dealer!
The sequence of programming for 1998 Audi A4 radio is:
1. Push simultaneous "SCAN" and "RDS" keys until on the screen will appear "1000" displayed.
2. Release keys. No more push on "SCAN" and "RDS" keys because otherwise number "1000" will be considered as first safe code attempt.
3. By the #1 key you will set up the first safe code digit.
4. By the #2 key you will set up the second safe code digit.
5. By the #3 key you will set up the third safe code digit.
6. By the #4 key you will set up the four-th safe code digit.
7. Then push again simultaneous "SCAN" and "RDS" keys for confirm this safe code. On the screen will be displayed "SAFE" notice. Release keys! For few seconds a radio frequence will be displayed. The radio is now ready for use!
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SOURCE: 2000 Audi a4 headlight bulb replacement
The easiest way to do it is to pull the headlight out of the car. This isn't hard, but you'll have to have a T30 Torx bit to do it. There are three bolts that secure the headlight. Two are on top of the headlight - you'll see them right up there on top when you open the hood.
The third is harder to find. Look where the outer upper corner of the headlight meets the top of the fender, above the corner indicator. There is a lip on the fender that runs all the way back to the base of the windshield, where the edge of the hood sits when it's closed. There is a round hole in that lip near the headlight (just behind it). Shine a light down in there and you'll see the third Torx bolt. Take that out and you can slide the headlight assembly forward. You shouldnt' have to take it fully out of the car, just take the bolts out and move it forward.
Then remove the dust cap on the back of the headlight, pop the connector off the bulb, undo the spring clip holding the bulb, and remove it. Install the new bulb (wipe down the glass portion with your t-shirt to get any skin oils off it, as they'll burn it up quickly), and then reassemble in the reverse order.
SOURCE: 2000 Audi A4 radio code
check the owners manual or maintenance guide , some people handwrite the security code in.
SOURCE: My check engine light is on for my 2006 audi a4
Your MAF may be dirty and needs to be cleaned or replaced. You may have a vacuum leak.
In the vast majority of cases, simply cleaning the MAF sensor does the trick.
Consult your service manual for it's location if you need help. I find it's
best to take it off and spray it with electronics cleaner or brake cleaner.
Make sure you are careful not to damage the MAF sensor, and make sure it's
dry before reinstalling
Inspect all vacuum and PCV hoses, replace if necessary
Check for a dirty fuel filter and proper fuel pressure
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I forgot to mention that I noticed a vibration in my car when its in drive an my foot is on the break,,,
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