86, 5000 cd turbo Having problems.

I own a 1986 audi 5000 cd turbo and I am having some slight problems please help.

1:Dash lights often cut out while driving and they turn on later when the car is hot(warm).

2: There is a knocking sound coming from under the hood people say its the lifters.?

3:Killing batteries like its running off a 9volt.     Lately Its been killing batterys maddly. I went through 2 in the last 2 weeks and its not cool hah.

4: Wants to stall.- When i come to a complete stop it chugs and wants to stall so i either have to ride the brake and the gas or put it in neutral untill green light then Rev the RPM,s and toss it in drive. ( and if it does stalls it is very hard to get started and today it killed the battery trying to start it. And also 2 years we had a new tranni installed because the old one blew.

Any information would help please. Thanks

for #1 some loose wires....do they work when its cold out?

for #2 i belive lifters make a ticking sound.....oil level ok?....also check spark plugs maybe bad detonation

for #3 the only thing i can think of why your car is munching on batteries is a bad alternator

#4 had this prob and thought i got it fixed (O2 sensor) but it came back dosent stall any more but some times at lights/stop signs the tack dives to 200 rpm and then goes back to normal...verry noticable a night when my headlights dim and go back to normal

i just puchesed a vag http://www.ross-tech.com for my car to get all my falts pinpointed.....sorry to say but you cant get this for your car

Yeah thanks for the info we thought the stauling was due to the alternator so ill for sure check into that (02 sensor)............