1162812501

I have posted this in every forum except for this one which is where I should have started. Can anyone tell me what this is? It should be a 5 speed transmission but I cant make heads or tails of the part number. Also does anyone know if this will fit in a 123? I have a great lead on a decent price for it.

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1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42