voltage should be same on tickover ,switch everything on, load alternator, lights ,heater heated screens everything and then bring revs upto 1500rpm and then check voltage , alternator is on full output at 1500rpm.
You have a direct short you need to trace phone power wiring and disconnect it totally till you find the short, this is the reason you cannot connect to mmi with vcds, is it aftermarket phone installation or standard audi setup?
First fault is simply the electric heater which warms the car till engine temp comes up has a blown element quite common the 2nd fault may just be a bad connection on alternator or the regulator/rectifier in alternator is about to go on permanent holiday.
Once engine is warm the idle oil pressure on vcds says Min , is this a sign the pick up is blocked or pump worn , im trying to get to the bottom of my rough hunting idle and slight misfire when first started for about 30 secs also throws cam/crank correlation fault all the time but does not...
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