1976 Mercedes-Benz 450 SL for Repair or Parts. "Please read description"

Condition:	Used
Make:	Mercedes-Benz
Model:	SL-Class
Type:	Convertible
Trim:	450 SL
Year:	1976
Mileage:	63,000
VIN:	107 044 12 028396
Color:	Grey Blue
Engine:	V8
Cylinders:	8
Fuel:	Gasoline
Transmission:	Automatic
Drive type:	RWD
Interior color:	Blue
Vehicle Title:	Clear
Item location:	Madison, Wisconsin, United States

Extras

Cruise Control
Convertible

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Description of 1976 Mercedes-Benz SL-Class 450 SL

I'm selling my 1976 Mercedes 450 SL for Parts or Repair, the odometer on the car shows less than 63,000 miles but I can't confirm that it is the real mileage. The car starts but will not staying running and doesn't seem to change gear while moving.
The 450SL should have a 4.5l V8 with the engine number 117.985, instead MINE HAS A 6.9L V8 WITH THE ENGINE NUMBER 100.985
The car has a crack on the windshield, and on the dashboard.
The body has some spot rust, see pictures
The interior needs upholstery.
Please, contact me if you need more information.
Thank you,