2001 Audi TT Quattro Base 4 Cyl 1.80L
Battery drain after 12 to 24 hours after driving.
My car fails to start after standing for more than 1 day without being driven. I have checked that the battery retains a charge, however, using the 20C display on the AC Diagnosis, the charge rate is indicated as 13.2 to 13.6 depending on the engine revolution. A similar problem occured a year ago and the repair shop said they changed settings to correct the problem. Any idea what / where these settings may be?
First of all the charging rate should be 14+ even under load (with all eletrical on), there is NO setting to correct this problem, the altinator needs replacing. Load test the battery and it should not drop under 9.6V