For 1998 to 2006 M113 V8 only. Will not work on AMG engines.
Since these engines run so well, some believe that the fuel injectors will last forever. If you have noticed your fuel economy is declining or your engine oil seems thin, then replace these injectors. Best to do it after 150K as a preventative measure to increase engine life
M113 V8 New Set of Fuel Injectors with Seals Attached
$218.50
SKU:
GEG-MII3INECTORS 
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$162.00
M112 V6 New Set of Fuel Injectors with Seals Attached
For 1998 to 2005 M112 V6 only. Know your engine! Will not work on AMG engines.
Since these engines run so well, some believe that the fuel injectors will last forever. If you have noticed your fuel economy is declining or your engine oil seems thin, then replace these injectors.