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Re: 1999 Audi A4 ekectrical
This is a known issue on these cars - they get "pixellated" as it's called. It's a manufacturing defect that Audi has so far ignored and refused to take care of for its owners. The only real fix for it at this time is to replace the information display (big-time pain) or to replace the entire instrument cluster, which is costly and requires the cluster and ECU to be flashed to work together. Honestly the best bet is to just deal with it for now. A large number of A4 enthusiasts are petitioning Audi to take care of the repair, but although so far it hasn't borne fruit, they're keeping at it and are trying to get some results.
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Try to clean rear parking sensors. Check also electric cables and connections, clean if necessary. Commons faults are sensors out of order. If one or more sensors faults you hear only a continous constant noise when you put in "R" gear. You need a VAS, VAG-COM, Bosch KTS, ... diagnosis scantool. The factory parking system will be scaned from errors with this instrument, and you will find exactly which sensors are out of order (for example: rear left center sensor, rear right side sensor break off, short to ground or short to plus).
Turn off the ignition press and hold the button on the leftside of the display while turning the ignition on it should say service oil on the display pull out the button on the rightside of the display until the service oil clears
No, it is not so simply. It is not a connection problem, bulb, ...
In the past I had the same problem on my car. I disassembled the instrument cluster, and there is no possibility to change this small display, because it is an embeded construction.
Your problem is the instrument cluster out of order !
If you want to solve this problem you must buy a new instrument cluster which must be encoded with a VAG diagnosis tool.
might need to be replaced it could be faulty might be able to be fixed put recomend get replaced cause if u get it fixed chances are same thing could happen again so just get replaced its safer and more reliable