Its definately an AMG, extremly rare and finding any information on it is quite hard. All that I know is that it used the 7.3 M120 V12 similar to the one from the CLK-GTR.

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1982 300GD Carmine Red (DB3535) Cabriolet Parting Out
1990 300SEL Smoke Silver (Parting out)
1991 350SDL Blackberry Metallic (481)

"The thing is Bob, its not that I'm lazy...its that I just don't care."