My 94 E320 has been idling rough and misfiring the last few days and I pulled theses codes, 5, 7, 8, 23 and 26. I already know about the coolant sensor being disconnected. Car has 126K miles on her and I replaced the spark plugs and the connectors (under the coils) which fixed these issues 50K miles ago when I had the same problems. Replaced the same this time and have the same roughness and codes. What next, take it to my indy? Thanks, guys.

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