felthove

The things I can think of offhand are:

1) Bigger engine, handbuilt
2) Better brakes
3) More standard interior features (sunroof, blue tinted windows, etc.)

What I wasn't sure about is the suspension, body styling, or anything else. Anything you can add would be appreciated.

E55 KEV

it also has:

AMG body styling (Optional on E320/E430 RWD Sport Sedans)
AMG Suspension for lower stiffer ride with AMG Springs, Shocks and Sway bars (Note: E320 & E430 Sport do not have sport suspension)
Rolled Fender Lips
AMG Wheels 18x8 front/18x9 rear
Tire Sizes for North America - 245/40/18 front/275/35/18 rear
HID Xenon (standard)
Heated Front Seats (standard)
MultiContour Front Seats (standard)
Metallic Paint (Standard) Optional on E320
Rain Sensing Wipers (Standard)
AMG steering wheel
AMG stamped on speedometer
Black Birdseye Maple wood
AMG Nappa Leather - silver, blue, charcoal and ruby red
Faux Carbon Fiber trim on B-Pillars
AMG Exhaust system with twin chrome tailpipes and 4 cats
Blacked-out taillamps
Power Rear Sunshade (standard)
155 MPH Speed Limiter
Transmission and Rear End from Mercedes V12

SaMaS

+1 Leather steering wheel air bag with AMG stamped in logo

lkchris

In other countries, E-class is sold in three trim levels, Classic, Elegance, and Avantgarde.

"Normal" USA E-class arrive in Elegance trim.

AMG E-class are by definition Avantgarde trim, but then added to that are some body styling, suspension, and engine changes.

"Smoke" taillights (LED on W211) are normal Avantgarde fare.

Note also that for W210, speedo and tach face for Avantgarde and AMG are grey, while lower models are black.

zoink

One more thing.... it gives you more grin than regular E-class.