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Premium Member
W107 500SL. 300CE-24 1990 1988xjs Jag
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172 Posts
Discussion Starter #1
Hi
THE owners manual for my 85 500sl says you need a special tool to remove and replace the spark plugs. Ive been to the local MB dealer but thet dont sell tools.They couldn't even describe it to me
If anyone has one of these wrenches could they describe it or better still post a photo so i can describe to the local tool shop
Thanks all
Rufus
 

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One of the BW Old Guard/R129, W204 Moderator
1997 SL500- 40th Anniversary
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7,166 Posts
Hi
THE owners manual for my 85 500sl says you need a special tool to remove and replace the spark plugs.... If anyone has one of these wrenches could they describe it or better still post a photo so i can describe to the local tool shop...Rufus
Do you have the MB tool kit that came with your car?
 

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Premium Member
W107 500SL. 300CE-24 1990 1988xjs Jag
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172 Posts
Discussion Starter #5
While i'm on a roll

One more maybe stupid question' Why leave you wondering when with one more inane question i can prove beyond all doubt

Is the plug gap related to the specific plug used or to the car its used in. If its the car what is the gap for the 500sl
STUPID Rufus
 

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Premium Member
2010 Mercury Milan Hybrid, 1993 BMW 325i convertible
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6,077 Posts
Is the plug gap related to the specific plug used or to the car its used in.
Yes. Meaning it's related to both the plug and the car. I don't know about the 560SL, but it's nearly impossible to find the correct (non-resistor) plugs for my 117.985 engine at an auto parts place, so I suck it up and go to the MB dealer for them. It costs more, but I get the right plug.
 

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Premium Member
W107 500SL. 300CE-24 1990 1988xjs Jag
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172 Posts
Discussion Starter #7
Thanks for the advice Scot It's offto the MB dealer monday morning to get plugs for both my MB's they don't open here on the weekend.
 

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1978 450SL (RIP); 2007 Impala 9C3 (Police); 2010 Ford Edge
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212 Posts
Do you have the MB tool kit that came with your car?
I'll be needing to change my plugs and i don't have the tool kit....can you unveil the tool mystery for me?:)
 

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1988 560SL (California Model)
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5,104 Posts
An old mechanic's trick...take about 1 foot of rubber hose and slip over the end of the sparkplug and install. Almost impossible to cross thread. If the plug binds it will slip in the hose. If all is well after a few turns pull the hose out and tighten with a socket.
 

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Premium Member
W107 500SL. 300CE-24 1990 1988xjs Jag
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172 Posts
Discussion Starter #10
I have found the tool and will endeavour to photograph it tomorrow and post it
Robert
 

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
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32,348 Posts
I have the MB tool but never use it. I use a ratchet and spark pug socket with the rubber boot inside. Add an extension and on some a swivel.
 

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1978 280slc
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3,203 Posts
The bosch plugs are getting impossible to find like Scott said, so I bought NGK 7333 to get rid of the WR7DC bosch plugs I got in mistake. You can find the bosch 7500 plug but they are 2-3x more expensive than the NGK.

I like the plug wrench as it makes it easier to get the plugs into the recessed head of the 6.
 

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
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32,348 Posts
The bosch plugs are getting impossible to find like Scott said, so I bought NGK 7333 to get rid of the WR7DC bosch plugs I got in mistake. You can find the bosch 7500 plug but they are 2-3x more expensive than the NGK.

I like the plug wrench as it makes it easier to get the plugs into the recessed head of the 6.
You cheat your plugs are vertical.
That is also why I use the plug socket with the rubber boot inside. Besides protecting the porcelain on the plug it makes it easy to pull the plug out of a tight spot. The plug comes away in the socket.
 

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2008 E320 Bluetec, 1988 560SL totalled unto death). 1997 Dodge Ram 1500, 1983 300CD
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1,342 Posts
Special tool

What the manual refers to is probably the tool to pull the spark plug connector. Actually any purpose-made spark plug boot puller will do. Trying to pull the boot off by hand will ultimately result in a broken spark plug connector, probably sooner rather than later. The wire resistance is built into the stock connector and pulling, bending, twisting will eventually ruin it.

Insofar as threading the spark plug in/out, any plug socket of the right size will do. Easier if there is a universal joint at the socket and if the socket is magnetic so you don't drop the spark plug into an inaccessible space.
 

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1978 450SL (RIP); 2007 Impala 9C3 (Police); 2010 Ford Edge
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212 Posts
Thanks. When I saw mention of a toll from the 'tool kit', I thought the typical spark plug socket wasn't going to do.
 

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Premium Member
W107 500SL. 300CE-24 1990 1988xjs Jag
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172 Posts
Discussion Starter #16
sorry i've tried twice to upload a picture of the spark plug tool dont know where i'm going wrong will try again tomorrow
 

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Premium Member
W107 500SL. 300CE-24 1990 1988xjs Jag
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172 Posts
Discussion Starter #18
Finally managed to get the photo on hope it dosen't take me as long to change the plugs
Hope it help
Rob
 

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1978 450SL (RIP); 2007 Impala 9C3 (Police); 2010 Ford Edge
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212 Posts
Thanks for posting the pic. I certainly don't have one of those.....but I've changed a ton of plugs, so I think I'll survive.
 
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