Here's the install and operating video of the OE version.
But looking at this previously, I'm sure I read that it's not compatible with the E89, but would have to check.
https://www.youtube.com/watch?v=Za0K5xKfPdU
**EDIT** Having just checked, although it is listed as compatible with the E9x series, which shares similar systems with the E89, the E89 is not listed.