How hard was the install i have a 2017 s and the dealer installed the the radio and is ther a install video anywhereNot so. Talked to my dealer and he pulled out the box and showed it to me. Nowhere on the box or his online info does it say 2017 SLR only. I just installed one on my 2017 SL and everything fit and worked just fine (after a full charge on unit and remote) The only harness you get into is the key switch, the hazard flashers and the radio. I believe that even if you did not have the factory radio the harness would still be there and powered. Others on the internet are reporting using the same alarm on their slings without problems. Of course you could just install a scropio SR-i900R and have the same alarm without the plug and play part. I got mine from my dealer $449.99, used the Polaris $50 off coupon, then my loyalty points so the end price was $314.99, good deal.