All I can say is you should have gotten an extended warranty. They don't cost all that much and will pay for themselves with just a couple incidents.
I just bought a barely used 2011 Itasca Reyo (Sprinter RV like yours) with 14K miles and paid $3200.00 for a 5/75 warranty. The warranty has zero deductible at my dealer and $100,00 deductible everywhere else. Covers everything except emission devices and some weather stripping.
Mine also has a heat pump AC unit, diesel generator, diesel engine...….all expensive stuff I don't have to worry about. Just got a free macerator pump installed.
Yes, 3200.00 is a pretty penny but I don't have to worry about nothing.
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