Author Topic: Valve Adjustment - Spark Plug Replacement  (Read 1232 times)


  • Vintage
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  • Posts: 518
  • 1975 450SE
  • Location: Massachusetts, USA
Valve Adjustment - Spark Plug Replacement
« on: 14 February 2010, 04:47 PM »
How often should you do a valve adjustment on a 450SE? The MB Maintenance Manual states every 12,500 miles. This seems excessive. I thought every 15,000 - 20,000 miles is more like it.

The MB Maintenance Manual also states that spark plugs should be changed every 12,500 miles. Just wondering how often everyone changes their plugs and what type of plug you are using. I recently purchased a set of NGK BP5ES -7832 plugs for my car. They are the non-resistor type which are supposed to be correct for the M117 motor.