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Old 07-26-2004, 08:58 PM   #1 (permalink)
ScubaDriver
BenzWorld Member
 
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Date registered: Sep 2002
Vehicle: 1999 ML320
Location: Jersey Shore
Posts: 167
Replace your spark plugs...

Got rid of the rough idle problem. Replaced the plugs. I had 85,000 miles, but it is a '99, so it's 5 years old. The plugs were REALLY bad, the electrodes were visibly worn.

By the way:
Bosch standard plug at dealer: $13.50 each, $171.00 with tax.
Bosch Platinum 2 plugs at Pep Boys: $3.99 each, $50.00 with tax.
Screwing your dealer out of $120.00 - priceless.
Dealer wanted 2 hours install, did it myself with info from this board.

Addendum to install instructions:
1. Remove coils on left side.
2. Remove air cleaner box on right side.
3. A 3" extention is too short, a 6" extension is too long. Goldilocks used a 1/2" drive ratchet with reducer attached to a 3" extension, just right.
It will take about an hour if you're good, two if you get liquored up while you do it (sounds like sex...)

Good luck,
Roger
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