The lady (Suzy) who had hers stolen this past September had this to say:
"The car is a stick shift, which i loved. The VIN # is 280sl016402, the odometer says @ 20,060, and the interior cover is a very light blueish gray."
So, the actual VIN on the data plate would probably be 113.044-10-016402. This plate is either in the drivers side door jamb or on the firewall. Since this car's door is unlocked, it would be easy to find and confirm. If the plate was removed, the VIN is stamped in the front right frame rail, below the hose leading from the air filter box to the intake manifold. Difficult for a novice to find, but it's there. Flashlight would help. Also, is this car's interior a light bluish-gray?
"(by the way, i still have the hard top)"
Suzy's hard top, if original, would have the body number stamped into it. We could see if the body numbers on the car match this.
I sent an e-mail to Suzy alerting her of this thread. Hopefully she will sign on and comment.