By your own, you can only check the fuses and relays to make sure there is nothing burnt/not working, if it is then change those and see if it helps.
More than that checking the instrument cluster for gauge inspection you need to take it to mechanic or rather mechanic first and then electrician.
Seems like the guage is died on you, seek a mechanic and check if they can repair or may be advise who can in Dubai or Sharjah. If not ultimately you got to replace it.
Before jumping on this better check all the fuses and relay are working on it. These electronics are really funny sometime. 2000 dhs problem can get fxied in 50dhs.
It looks like first you should get the gearoil and gear filter changed immediately. If its still jerking in gear shift than show to any gear workshop they can rebuild the gear. There is one in Aweer (ras al khor) main road, when you come from dubai towards hatta on Hatta oman way get into service lane after eppco and keep driving staright and its on ur right hand side, dont know the name precisely. I think its DEXOL.
Better get the full diagnostic done, as in older non ECU controlled cars this seems like a missing issue. But in modern day car it needs to be diagnosed with proper VAG compliant OBDII tool. It may be a as small issue as missing or cyclinder misfiring due to to bad spark plugs, or lead. Or it could be something serious and faulty in gearbox.
You can visit VIP German garage in rashidiya, they are nice and not so expensive like dealers especially for older cars.
Also you can try fw in Al Quoz area behind Time square center.
Im sure any or all mechanic do brake job in a day time. It more than enuf tme dude.
You run past a quoz for many good garage like Max garage, VIP garage, robbies etc
U can change the plastic hose part or fix strong duct tape on it, if not bothered abt appearance. Its no big deal. as its taking 1 % unfiltered air wont make any much difference.
Check the fuse, some warning message isnt appearing for fuse. If dont know which fuse as per diagram. Check all fuses it will take 10 mins.
Same i do last month and fix interior reading light when it stop coming up.
Visual check, visual check, visual check is the key. No computer or gauage can tell u where leak is.
Find find find until u find out and get it fix.
It may get serious if big leak, if u cant find it show to mechanic. remove bash plates, heat shield from underneath and discover.
Is that the speed limit beeping u meant?
You can pull its fuse, and if error message comes that means u have to get it disable from dealer. not sure abt R9. In S8 its a fuse w/o any error.
If its immobilizer horn u mean, it uses your same horn whose control on steering wheel. That is located in front of engine bay near radiator on either side.
MIxing is not recommended. Better empty full tyre and re inflate with either one.
Secondly keep the car running so that TPMS (Tyre Pressure monitoring system) can judge the change and stop beeping after you finish.
hey i have a 2005 audi q5 which was my brother who has left the country...
now my problem is that the thermostat of the temp gauge it dose not come up to the middle it stays down,
before i thought that it could me that the winters may have struck her hard but man i drive to jabel ali and still its sleeping.
guys what could be the issue as the car is wording absolutely fine
thanks