SOS Services USA is a veteran-owned mobile RV repair operation in Chula Vista, founded in 2017 and dispatching certified technicians to campgrounds, storage yards, and driveways across San Diego County. Mobile service calls cover the same South Bay corridor where Angelo's Towing Chula Vista provides heavy-vehicle transport for fifth wheels and Class A motorhomes that cannot be driven to a bay. The shop holds manufacturer certification for Truma heating systems and Aqua-Hot hydronic units, two proprietary RV climate-control platforms that require brand-specific diagnostic tools and replacement modules. Roof-leak remediation, Tecma marine-toilet rebuilds, and hydraulic-jack troubleshooting round out a service menu that eliminates the need to tow an RV to a fixed facility, a capability that pairs with windshield and side-glass replacement from Auto Glass Depot for storm-damaged coaches. The highest-complexity dispatches involve Aqua-Hot 600D hydronic heating systems, which circulate a diesel-fired glycol loop through six independent heating zones and require pressure-testing at 15 PSI before recharging the closed circuit.