I'll ignore my attempt at diagnostics and go ahead with new coil packs (and wires). It just makes too much sense to think it's anything else. At 107K all ignition parts are original. It won't be money wasted.

I'll be going with Bosch for the parts. Beck Arnley is a second choice. Other choices (cheaper) are Delphi, Bremi, and Prenco.

The OVP was updated long time ago. I should also mention the engine wiring harness was replaced nine years ago and shouldn't be an issue.

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95 E320 Cabriolet, 169K