I believe 83-85 380 SL's came with the upgraded double row sprocket for the timing chain. The early 81-82's had a single sprocket, and were very problematic in skipping chain links, causing engine damage, you know valves hitting pistons.
I'd inspect just to make sure.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".