 I have had my Audi Q5 in the Audi service department 4 times over the last 6 months.  This time it broke down on me 2 weeks after Audi stated it was fixed.  Well, now they are telling me I need a new engine at the cost of $14,700.  They will not take responsibility for their mistakes or mis-diagnosis.  They said that is was a cracked head and that Audi does not issue replacement parts.  It has to be a complete new engine.  Not only has my car been in the service department for 2 months, Audi had the mechanic remove the cover and look a bit further.  I did not authorize anything to be done.  They still have my car and now have told me that they will not help with their mistakes.  Now I have no car and no answers.  The oil consumption is another issue all together.  1 quart per 750 miles.  I spent more money on oil than gas.  But as always, they say its normal.  The airbags in my Q5 are on the recall list.  Audi however, will not issue a recall.  They have left us hanging and has put mine and my families life in danger.PLEASE PLEASE PLEASE do  your research before purchasing any Audi product!UPDATE:  we have the audi towed to a private mechanic that said it was the timing chain tensioners and if that were fixed my car would run. Per audi the engine is blown. These people are crooks.