There is no "Silver Edition LE." The "Silver Edition" is a trim level that sits between the "SV" and "LE" trims. From Edmunds.com"
Body Styles, Trim Levels, and Options
The 2012 Nissan Pathfinder is a midsize seven-passenger SUV offered in five trim levels: S, SV, Silver, LE V6 and LE V8.
Standard equipment on the entry-level S model includes 16-inch alloy wheels, rear privacy glass, roof rack rails, air-conditioning, an eight-way manually adjustable driver seat, cruise control, full power accessories, a tilt steering wheel and a six-speaker stereo with a CD player.
The SV adds 17-inch alloy wheels, automatic headlights, foglights, running boards, dual-zone automatic climate control, rear air-conditioning, upgraded cloth upholstery, an eight-way power driver seat, power-adjustable pedals, a leather-wrapped steering wheel, a 7-inch color multi-information display, a rearview camera, a six-disc CD changer and an auxiliary audio jack.
Step up to the Silver trim level and you get heated mirrors, body-color/chrome side moldings, keyless ignition/entry, leather upholstery, a four-way power passenger seat, heated front seats and Bluetooth.
The LE V6 model comes with 18-inch alloy wheels, roof rack crossbars, driver seat memory functions, a heated steering wheel, wood-grain trim and a navigation system with digital music storage. The top-of-the-line LE V8 loses the standard sunroof but gains the 5.6-liter V8 engine and four-wheel drive.
The options list is short and includes a sunroof and the rear-seat video entertainment system.