After replacing one of the coil's as you suggested on the 1993 300E 3.2, The car is running good, the check engine light is staying lit. I cleared all codes by disconnecting the battery while installing the new coil, the codes I get now are:

test button = 2,7

using Arthur Dalton's home built tester i get the following:
location 6= 3
location 7= 1
location 8= 9
location 10= no blips at all
location 14= 1

not sure what codes are normal on the 3.2 liter, location 8, code 9 I searched for codes and in other posts responses appear to be an ignition problem. Is it another coil acting up?

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Thanks, Juan