Edit: The aftermarket Bosch plugs have ZR6SII3320 have printed on them. The Genuine MB plugs have ZR6SII3320R printed on them. Both plugs were Made in Germany. Obviously the MB plug (right) is used, but the electrode design looks very different to me. Bosch says it is the correct plug for the application.
Thoughts? The new plug was purchased from Worldpac.
Thoughts? The new plug was purchased from Worldpac.
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