Couple years ago, I bought this for my BMW 4 series convertible and they’ve been a excellent feature. But now I’ve sold the car and no longer needed. It’s in perfect working conditions but there isn’t an instruction booklet so wouldn’t recommend buying this unless you know how to stall it or know a person that can. It does come with all the cables that originally came with them. Please do let me know if you have any questions before buying this.
eBay