Hi all. I have a 2006 B7 S4 Avant and replaced the faulty OEM rear parking sensor speaker with one that I found on eBay (brand new, Chinese). All is good except for the volume of the speaker. It is quite low so I utilized VCDS in an attempt to increase the volume but the value is just stuck on "4". It will not register a new value. So I'm wondering if the problem lies in the fact that the new speaker is not OEM. Or am I doing something wrong within VCDS? Any insight is greatly appreciated. Thank you!