Ok, since Bosch website does not work, I went like this:
Engine for 280SE = 130980 engine (our Wiki)
For 130980:
distributor PN is A 002 158 38 01
cap PN A 000 158 25 02 replaced with A 000 158 53 02 BOSCH 1235522060
rotor PN A 000 158 20 31 BOSCH 1234332088
If my logic is correct, this is what I found. I could not cross-reference Bosch PN of the distributor with Mercedes part number.