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2000 ML320
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Discussion Starter #1
2000 ML320 82K
I'm trying to change out the plugs in my new /old rig. There is just enough room to get my hand between the fuse box and touch the spark plug connecters. WIS shows a wrench to remove the connectors but when I checked the discription was a valve adjustment wrench (PN 110589010100). I'm about to remove the fuse box for more room.

Is there an easier way?

fyi
The plugs I've removed may be OEM (as in new car OEM) the gap is 048 and the plug isn't made anymore.
 

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'07 C280 4matic, '06 530i, '98 ML320
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nbtwb, remove the drivers side wheel and the wheel well cover. You will have better access from there.
 

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02 ML320 06 ML500
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2000 ML320 82K
I'm trying to change out the plugs in my new /old rig. There is just enough room to get my hand between the fuse box and touch the spark plug connecters. WIS shows a wrench to remove the connectors but when I checked the discription was a valve adjustment wrench (PN 110589010100). I'm about to remove the fuse box for more room.

Is there an easier way?

fyi
The plugs I've removed may be OEM (as in new car OEM) the gap is 048 and the plug isn't made anymore.
Original equipment plugs come with a M/B logo on it and the manufacturer of that plug is stamped on the six sided boss. But you failed to mention what brand plug that isn't made anymore.

Gap settings do not change from manufacturer to manufacturer for a specific vehicle and a .048" setting is too large. The correct gap is .039-.040" (see below). Stick with Bosch or NGK plugs and use the standard plug.

NGK.com - Application Search Results
 

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'99 ML430 and '01 SLK320
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I use a 3/4" open end wrench to pop the plug wires off the plugs. You have to fidle around a bit to get a good grip on the metal part of the plug wire but they pop right off with good leverage.
 

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'01-E320 & 02-ST2
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There is a guy who sells a wrench specially adapted for this on ebay for about $25 with shipping, just search or here is a current link: eBay Motors: Mercedes Spark Plug Wire Wrench Tool M112 V6/M113 V8 (item 370185980549 end time May-09-09 23:19:37 PDT)

Or you can PM Ohlord who has the old valve adjustment wrench, I don't know what his current pricing is on it.

I used the Lisle convertible tool on mine but it was pretty tight on a few of them. If you are careful you can use it successfully.

However you do it, do be sure to regard the wires themselves like a banana, you don't even want to bruise them, particularly at the connections to the boots. The boots are quite stout (and hold on like it, too) but the wires are quite fragile and much abuse will render them useless, and they're pretty expensive (depending on brand and V6/V8, $130-$300 plus a set, individually they're about $20).

Take care and enjoy the ride,
Greg
 

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2000 ML320
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Discussion Starter #6 (Edited)
By the time I got home the 2 wrenches on ebay were sold. I sent the seller a message and the tool is relisted ebay #370189626760
 
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