the reply as below

来源: 于 2016-02-28 13:35:23 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

I talked to my dealer, and he referred this to the service manager. Here is the reply:
"Hello David,
 
No one seems to know for sure. Looking at it most say it is number 2.
"