Thread: replacing spark plugs M103-983 engine
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Old 12-28-2005, 04:53 PM
lkchris lkchris is offline
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Join Date: Jun 1999
Location: Albuquerque, NM USA
Posts: 1,947
The plug gap recommended by Mercedes is the same as the plugs are manufactured--you'll note a gap specification on the box.

You can check them before you install them but they will all be perfect unless a box was dropped. This of course applies to Bosch plugs, only.

Ignore "inch" gap figures and use metric gap figures as befits a German car.
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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
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