Spark plug replacement...how to.
Newbie
Joined: Mar 2009
Posts: 2
Likes: 0
From: sausalito, ca
ml320
trying to link to your information that you have provided here but the link seems to be broken. i'm new to MB, just recevied a 2000 ml320 as a gift from a freind. the dealer says i need to replace the coils plugs, etc, to the tune of $2,500. not in my budget so i can trying it myself first. love to have a step by step that i think this link is... can you help?
Senior Member
Joined: May 2003
Posts: 398
Likes: 1
From: In A Van Down By The River
2014 RX 350 F Sport, 2007 Scion tC, 2000 ML 430 Money Pit Finally Gone! Oh Happy Day!
trying to link to your information that you have provided here but the link seems to be broken. i'm new to MB, just recevied a 2000 ml320 as a gift from a freind. the dealer says i need to replace the coils plugs, etc, to the tune of $2,500. not in my budget so i can trying it myself first. love to have a step by step that i think this link is... can you help?
Newbie
Joined: May 2006
Posts: 6
Likes: 0
another hint
I did mine today but did not have to remove the coils on the passenger side. On the driver side, you must remove the coils else you have no chance removing the boots and spark plugs.
thanks for the rest of the write ups, very very useful. It took me 1.5 hr also.
thanks for the rest of the write ups, very very useful. It took me 1.5 hr also.
MBWorld Fanatic!
Joined: Apr 2007
Posts: 6,171
Likes: 16
300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Don't use anti seize
The plugs are trivalent plated and anti seize screws up torque values, and one drop on the electrode can fry a plug.
A late addition to the guy using a 17mm open end.If you use the 17mm special spark boot tool Mercedes uses at the shop you have no worries getting at the metal boots at the proper angle.
17mm special spark boot tool Mercedes
16mm thin walled spark socket
Mechanics gloves
security torx bits
swivel joint
short extensions
Magnetic pick up wand (for the stuff you drop
)
Fender blanket
Use the hood release to go full vertical
A late addition to the guy using a 17mm open end.If you use the 17mm special spark boot tool Mercedes uses at the shop you have no worries getting at the metal boots at the proper angle.
17mm special spark boot tool Mercedes
16mm thin walled spark socket
Mechanics gloves
security torx bits
swivel joint
short extensions
Magnetic pick up wand (for the stuff you drop
)Fender blanket
Use the hood release to go full vertical
Last edited by ohlord; Dec 6, 2009 at 01:52 PM.
Member
Joined: Jul 2002
Posts: 148
Likes: 17
From: NJ, USA
2013 GL450, 2023 Tesla Model Y LR, 2024 Outback L XT
question on grease /ant-seizing..
All - i understand that this is an old post but have questions on what grease/silocone/di-electric product to use.
1. I want to stay away from WD-40.
2. It looks like I need to put some kind of grease on the boot of the sparkplug wire. What should i use here and in what form? Silicone grease is sold in paste and spray. I'm inclined to buy the silicone grease is paste/tube. Do i just put some of this on my finger and "paste" it on the boot of plug wires?
3. I read about anti-seizing paste. Where does this go? On the 20+ threads of the sparkplug?
4. what needs to be di-electric? The anti-seizing paste, the silicone grease or both?
Please help me by the right greasing stuff so that i don't damage the engine.
thanks in advance,
maneesh
All - i understand that this is an old post but have questions on what grease/silocone/di-electric product to use.
1. I want to stay away from WD-40.
2. It looks like I need to put some kind of grease on the boot of the sparkplug wire. What should i use here and in what form? Silicone grease is sold in paste and spray. I'm inclined to buy the silicone grease is paste/tube. Do i just put some of this on my finger and "paste" it on the boot of plug wires?
3. I read about anti-seizing paste. Where does this go? On the 20+ threads of the sparkplug?
4. what needs to be di-electric? The anti-seizing paste, the silicone grease or both?
Please help me by the right greasing stuff so that i don't damage the engine.
thanks in advance,
maneesh
MBWorld Fanatic!
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
Nothing, absolutely nothing is supposed to be put on the spark plug threads.
A very small amount of dielectric grease should be applied to the insulator of the spark plug, but not on the terminal. This will make it easier to install the boot and easier to remove when needed
A very small amount of dielectric grease should be applied to the insulator of the spark plug, but not on the terminal. This will make it easier to install the boot and easier to remove when needed
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Newbie
Joined: Apr 2014
Posts: 8
Likes: 0
2002 ML 320 Sport
Did this today at just under 3 hours got hung up on the 5th plug facing the firewall driver side that ate up some time.
A few thoughts, you need the 3 inch and 4 inch extension.
A little cut up, the gloves are a great idea.
Start passenger side.
Broke one plug, as others have said, the boots should pop off, having a shorter and longer 17mm is helpful, used a wine cork to get some better leverage on no. 5.
As I understand the coil packs are interchangeable and they have a tiny diagram impressed on their sides that shows proper re installation of the two boot wires.
I used the OEM Bosche plugs with the light blue stripes on them, same that I pulled out. Old plugs just looked very dry and for sure loss of gap otherwise just old plugs.
126,000 miles and purrs like a kitten.
A few thoughts, you need the 3 inch and 4 inch extension.
A little cut up, the gloves are a great idea.
Start passenger side.
Broke one plug, as others have said, the boots should pop off, having a shorter and longer 17mm is helpful, used a wine cork to get some better leverage on no. 5.
As I understand the coil packs are interchangeable and they have a tiny diagram impressed on their sides that shows proper re installation of the two boot wires.
I used the OEM Bosche plugs with the light blue stripes on them, same that I pulled out. Old plugs just looked very dry and for sure loss of gap otherwise just old plugs.
126,000 miles and purrs like a kitten.
