Back then AMG was basically a MB tuner. They did whatever the customer wanted or was willing to pay for.

They had:
Engine/Performance Packages
Aero Packages
and of course parts.

If you can find a old Beverly Hills Motoring catalog it will have all the AMG parts and packages listed.

Make sure the car you are looking at has papers to go along with it. Many AMG tuned cars have plaques on them usually in the engine compartment. I think the fully tuned cars had serial #'s on the plaque.

If you have questions if your car is a fully tuned AMG car or a look alike is to contact Renntech. The owner Mr. Hartmut Feyhl use to work at AMG along with some of my friends. I am sure he would be able to help ID your car.