Hi

What is the difference between the various ICMs? I have been provided with several part#s, but for the cost$$$$ do not want to get the wrong item.
Need one (so I have been told) for a 87 560SL
VIN# WDBBA48D3HA072769
Part #s
0227 400 693
0227 400 600
0227 400 624
003 545 9132
004 545 5532
W0133-1597063



Help!!!!!!