The Samsung RF18 at 24.5" width with doors removed should fit through your Bounder 35E door opening that's slightly larger than 24.5". However, precise measurement and careful planning are essential for successful installation.
Several aftermarket solutions work better than original plastic latch. RV-specific magnetic catches are popular and invisible. Camco makes RV fridge latches. Bungee straps work as quick fix. Many owners use combination of solutions for security.
The electrical manual for your 2007 Dyna Max IE250's Dyna Air Ride suspension is typically found through Monaco Coach Group archives or specialty RV parts dealers, as this was a premium system installed on select Dyna models.
Small residential fridges have poor reviews in RVs due to vibration and off-level issues. Consider RV-specific residential-style fridges from Furrion or Everchill instead. If going residential, choose quality brands and plan for power requirements and proper securing.