I bought used a6 3.2 2005 fsi with 150 000 km. When the engine is warm, car starts without any problems, but when I start the car first thing in the morning it cranks for 3-4 sec. (during the night temp are below 0 (-7). Yesterday the first start failed after cranking for 5 sec. When I turn the key one more time, it starts immediately. Cranks for 1 sec or less. Only the first start takes long time. I have the car for 1 month so I don't know if the same thing is happening in the summer....
Battery is new, spark plugs are new, fuel filter and air filters are new. Fuel is top grade 95. I'm thinking if the alternator or injection are not in good condition, then the second start should also be long because the engine is still cold, but the second start is perfect... The problem is even more noticeable when I do long trips, then start the car next day in the morning...
Does someone know what could be the problem?

Other than that car runs perfectly...

 

I have attached a link to a TSB library that I have set up with all of the TSBs that I have. Take a look in the engine section.

Audi A6 TSB List

 

I tried few things but it didn't help. Thnx for the link anyways

 

Hi vule666
Did you finded a solution for your start problems when Cold, I have the same problem with my audi A4 3.2 quattro 2005, 148000 km.
Michael Adamsen, Denmark