Morning CP MAverick-
" I have had a Salsa Deluxe for about a year and I like it. I loved it at first, but then the lock stopped working after 4 months, kind of a bummer for something so expensive to not have a better warranty. "
After 4 months.
You have remaining a 4 year 8 month warranty to cover that and other problems.
Today, just taking the ID Nr. off the case will suffice by the authorized repair shop, which is then used to bill-back the repair cost to Rimowa.