Thread: spark plug gap
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Old 01-14-2000, 08:59 AM
Posts: n/a
Opening the plug gaps to 1.0 mm(.040")will make the car idle much better. It exposes more of the air/fuel mixture to the spark and uses a bit more of the potential current from the ignition system without overloading the coil. The only complaint I've ever heard of was one customer that said the wider plug gaps lowered the top speed of his 560SL by 5 mph. I use a modified ignition system from the mid-eighties on a 69 300SEL 6.3 and run the plug gaps at 1.4 mm with no problems.
Try works.
Randy D.

ASE Master Tech
Mercedes Tech 19 Years
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