Hello,

New to the forum. I've had a few 911's in the past but never a turbo. I test drove an 08 TT AT cabriolet last week and fell in love. I asked the dealer (not a porsche dealer) to do an oil change before picking it up. They did and also detailed the car prior to delivery.

The sport mode worked before the oil change/delivery but now wont turn on. The boost shows zero psi or bar and sport button wont turn on. No error messages on the dash or anything of that sort.
I'm very angry and have been searching around to see what the issue can be.

any ideas on what this can be? will it damage the car driving it with this issue as i cant get anyone to see it until next week.

Also the weirdest 'clunk' noise comes from the passenger front end when the car is shifting from 3 to 2. Its pretty loud, sound like a transmission issue but i dont know why from the front end. Any problems with 997 TT AT tranny? i want the dealer to fix everything.

please advise

 

Have your steering angle sensor checked might be off hence sport button not working. happened to mine.

 

So I noticed the oil level was higher than max. Now the oil is at max and the boost gauge is working. Weird? I don't know.
Sport button still not working though. Have to get it checked out tomorrow at Porsche

 

The clunk may be the front differential. I just fixed the same problem in mine.