Question about 1994 Mercedes-Benz E-Class
It's known as "pinking" and can be caused by a few things.
1, fuel grade/mixture.
2, spark plug gap/grade/dirt/leads breaking down.
3, timing out slightly
4, rotor cap damp/ old
Check them one at a time until the problem is solved.
Posted on Jun 26, 2009
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Posted on Jan 02, 2017
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