Vanos problem

[Niel333]

My car's Vanos was done by agents under warranty, it was nice and quiet for 1000kms/ 3months. Its now just as noisy as before and my warranty expires in 7 days. I took it back this morning and they dont have a problem in fixing it again but I am worried that there is a underlying problem thats causing the Vanos to fail and might cause damage to the engine in time to come, then I will be stuck with the cost!!!

Any advice would be much appreciated as it seems the agents dont know what they are doing and time is running out...