2004 Newmar Essex 4505 Oxford 500 Cummins 45ft. 5 Slides, Triple A/C, 500 HP. Luxury Motor Coach This 2004 Essex 4505 Oxford by Newmar Corp. has many Upgrades that most Motorhomes didnt have for anoth 5 years! Aqua Hot System, Triple A/C's, Side View Camera's, GPS System, 12.5 KW Generator, King Size bed, Pass thru Slide Tray, Spot Light, & more!