dear,
thanks for your message.
1.yes,this unit will replace the original radio .
2.of course,our unit can work with the steering wheel controls .
3.so sorry that it comes without a instruction video,but we will send the instruction to you,it will tell you how to install:
https://www.seicane.com/volvo-cx90-cd-radio-upgrade-repalcement-installation-guide-h6042#tab3
4.we will send all needed cables to you,it is plug and play.
Could you please send us the photo of your car's dashboard to [email protected]?
And could you please tell us the model and year of your car?
Then we can help you check if this unit can fit your car or not ,hope you could cooperate with us.
Looking forward to hearing from you soon.
Thank you & Best regards!
By
Seicane