strange problem with my cayenne 2011
 

Hello
l have new cayenne s 2011
There is strange problem porsche dont know yet how to figure it and they keep saying to me we had sent email about this issue and waiting for responde! !!!

The problem simply when i drive slowlly after the gear change from 2 to 3 i hear some noise like tek tek tek! lol
and when i accelarate it is gone
it is only immdetly after the gear change and when the rpm down in slow driving and i have noticed that the noise increase when the engine become more warm!
I dont have any answer from porsche which is really shame to answer by (maby) every time!
They told me it maby from the valvs it may need update programming

any ideas?