Thread: Best plugs for 89 Mercedes 420SEL ??
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Old 05-12-2005, 10:14 AM
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Mike Murrell Mike Murrell is offline
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Good advise from all above.

The gas 126 cars from 1986-1991 ran good on what they came from the factory with - Bosch copper plugs.

None of the multi-electrode plugs will work better and in many cases will run worse, especially at idle.

My 2 cents.
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Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"
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