2017 MB E300 loaner $448/mth + tax

I was quoted this deal for a E300 loaner in the Bay Area. I like the 19" wheel, Panorama Sunroof and pilot parking. Dealer wouldn’t budge for lower selling price or MF. What do you guys think?

E300W $52,150
040 Black
121 Black MB-Tex
L3C 3-spoke Multifunction Steering Wheel
P01 P01 Premium 1 Package: Rearview Camera, Parking Pilot, NFC Wireless $3,100
P17 : Keyless Go Comfort Pack
218 : Rearview Camera
234 : Blind Spot Assist
235 : Parking Pilot
536 : SIRIUS XM Satelite Radio
871 : Hands-Free Access
873 : Heated Front Seats
881 : Electronic Trunk Closer
889 : KEYLESS-GO
897 : NFC Wireless Charging
RTK 19’ AMG Twin 5-Spoke Wheels $500
068 Wheel Locking Bolts $150
104 Rear Deck Spoiler $350
322 322 Sport Wheel Package: Sport Body Styling, Mercedes-Benz Star in $650
P14 : Sport Interior
P15 : Sport Exterior
U29 : Perforated front brake discs & front brake calipers
772 : AMG Body Cladding
413 Power Tilt / Sliding Panorama Sunroof $1,090
51U Black Headliner
608 Intelligent Highbeam Control $250
677 Sport-tuned suspension for Sport
736 Natural Grain Black Ash Wood
810 Burmester Surround Sound System $850

 SUBTOTAL                                                               $59,090
 DESTINATION & DELIVERY                                                    $925
 TOTAL                                                                  $60,015

Original MSRP: $60,015
Selling price: $47,981
Down: $0
Drive off including security deposits: $6012.23
Terms: 12k/year for 36 months
Monthly before tax: $448
Monthly after tax and all fees: $489
Residual: 59%
Money Factor: .00077
Total of payments: $17,612