Upcoming spark plug job
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Joined: May 2011
Posts: 106
Likes: 1
2008 E550
Upcoming spark plug job
Hi guys,
I'll be changing the plugs on my 2008 E550 once they arrive (went with the Bosch Platinum plugs that are the factory plugs).
I've seen in all the DIY guides that an offset wrench is highly recommended, but all those guides are for e320s/350s or E500s. I haven't seen anyone say that in the context of a w211 E550.
Can anyone advise whether this tool is needed or will even fit or work?
if you have first hand experience with w211 e550s and have used a tool, I'd love to see the tool you used.
Thanks!
I'll be changing the plugs on my 2008 E550 once they arrive (went with the Bosch Platinum plugs that are the factory plugs).
I've seen in all the DIY guides that an offset wrench is highly recommended, but all those guides are for e320s/350s or E500s. I haven't seen anyone say that in the context of a w211 E550.
Can anyone advise whether this tool is needed or will even fit or work?
if you have first hand experience with w211 e550s and have used a tool, I'd love to see the tool you used.
Thanks!
Member
Joined: Jan 2016
Posts: 162
Likes: 8
From: Rochester NY
07 E550 4M - 11 Audi TT - 99 Expedition EB
No special tools required. Need a T27 to remove the coils and a regular spark plug socket to pull the plugs. Advise doing it on a cold engine but other than that one of the easier plug changes I've ever done.
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2008 E550
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Joined: Jan 2017
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From: Bay Area
W218 Stage 2, E85
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2008 E550
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Joined: Jan 2014
Posts: 3,969
Likes: 1,317
From: Republic of Texas
'99 and '05 E55 AMG
"Mercedes spark plug boot removal tool" in Google will bring up all you need to know. You want one of these. Made the job much easier on both of my V8 Mercedes.
Search for "Mercedes spark plug socket" also. This is also nice to have.
A calibrated torque wrench is nice; if not, after gasket contact, tighten additional rotation as noted on the spark plug packet.
Heck, so long as I'm here, I'll tell you to replace the spark plug wires also. Be advised the wires are of multiple lengths and part numbers! As you pull them off, lay them out on the floor, then match the new wire part number to the old and install in the correct location. Silicon (aka "dielectric" grease (only a thin film!) on the inside of the boots for spark plug and coil is also a good thing.
Search for "Mercedes spark plug socket" also. This is also nice to have.
A calibrated torque wrench is nice; if not, after gasket contact, tighten additional rotation as noted on the spark plug packet.
Heck, so long as I'm here, I'll tell you to replace the spark plug wires also. Be advised the wires are of multiple lengths and part numbers! As you pull them off, lay them out on the floor, then match the new wire part number to the old and install in the correct location. Silicon (aka "dielectric" grease (only a thin film!) on the inside of the boots for spark plug and coil is also a good thing.
Last edited by bbirdwell; Feb 12, 2017 at 05:55 PM.
Thread Starter
Member
Joined: May 2011
Posts: 106
Likes: 1
2008 E550
"Mercedes spark plug boot removal tool" in Google will bring up all you need to know. You want one of these. Made the job much easier on both of my V8 Mercedes.
Search for "Mercedes spark plug socket" also. This is also nice to have.
A calibrated torque wrench is nice; if not, after gasket contact, tighten additional rotation as noted on the spark plug packet.
Heck, so long as I'm here, I'll tell you to replace the spark plug wires also. Be advised the wires are of multiple lengths and part numbers! As you pull them off, lay them out on the floor, then match the new wire part number to the old and install in the correct location. Silicon (aka "dielectric" grease (only a thin film!) on the inside of the boots for spark plug and coil is also a good thing.
Search for "Mercedes spark plug socket" also. This is also nice to have.
A calibrated torque wrench is nice; if not, after gasket contact, tighten additional rotation as noted on the spark plug packet.
Heck, so long as I'm here, I'll tell you to replace the spark plug wires also. Be advised the wires are of multiple lengths and part numbers! As you pull them off, lay them out on the floor, then match the new wire part number to the old and install in the correct location. Silicon (aka "dielectric" grease (only a thin film!) on the inside of the boots for spark plug and coil is also a good thing.
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From: V E G A S
1922 Ford Model T / no OBD
Instead paying arm and leg for the "special tool" you can go on garage sale or fleemarket and buy 17mm or 5/8" ofset wrench for +- $1.
45 seconds with haksaw to cut it open and you are set for life.
I bought our E320 at 143k miles and having records about dealer maintenance, I simply assumed the plugs were changed at 100k.
Car pass CA smog test just fine. Only a year later I reread the records and the code I took for plugs was something else.
So finally at 156,000 miles I put new plugs and the old one were definitely original as center electrodes were gone.
I observe mpg very carefully and new plugs did absolutely 0 change.
45 seconds with haksaw to cut it open and you are set for life.
I bought our E320 at 143k miles and having records about dealer maintenance, I simply assumed the plugs were changed at 100k.
Car pass CA smog test just fine. Only a year later I reread the records and the code I took for plugs was something else.
So finally at 156,000 miles I put new plugs and the old one were definitely original as center electrodes were gone.
I observe mpg very carefully and new plugs did absolutely 0 change.
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Joined: Feb 2017
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2007 E550 4Matic & 2010 ML350 BlueTec 4Matic
1) There are no "spark pug wires" on a W211 E550. There are 8 coils directly over the plugs. You don't even have to disconnect the wire harness to the coils.
2) You do not need ANY special tools, like boot removers, etc. etc.
It's literally one of the easiest spark plug jobs to do.
3) The majority of the people posting above have no idea what they are talking about regarding the W211 E550 and spark plugs.
3/8 ratchet
spark plug socket (small)
3" extension (give or take)
8" extension (give or take)
T27 (I think) socket
3/8 universal
Dielectric Grease
You will be done in 45 minutes TOPS. Give a slight tug on each of your coil wire harnesses. If any of them come loose off the coil, you may have to wrap a zip tie around the coil and the end of the plug, just to make sure they are secure.
2) You do not need ANY special tools, like boot removers, etc. etc.
It's literally one of the easiest spark plug jobs to do.
3) The majority of the people posting above have no idea what they are talking about regarding the W211 E550 and spark plugs.
3/8 ratchet
spark plug socket (small)
3" extension (give or take)
8" extension (give or take)
T27 (I think) socket
3/8 universal
Dielectric Grease
You will be done in 45 minutes TOPS. Give a slight tug on each of your coil wire harnesses. If any of them come loose off the coil, you may have to wrap a zip tie around the coil and the end of the plug, just to make sure they are secure.
Last edited by Sydwayz; Feb 14, 2017 at 10:51 AM.
Thread Starter
Member
Joined: May 2011
Posts: 106
Likes: 1
2008 E550
1) There are no "spark pug wires" on a W211 E550. There are 8 coils directly over the plugs. You don't even have to disconnect the wire harness to the coils.
2) You do not need ANY special tools, like boot removers, etc. etc.
It's literally one of the easiest spark plug jobs to do.
3) The majority of the people posting above have no idea what they are talking about regarding the W211 E550 and spark plugs.
3/8 ratchet
spark plug socket (small)
3" extension (give or take)
8" extension (give or take)
T27 (I think) socket
3/8 universal
Dielectric Grease
You will be done in 45 minutes TOPS. Give a slight tug on each of your coil wire harnesses. If any of them come loose off the coil, you may have to wrap a zip tie around the coil and the end of the plug, just to make sure they are secure.
2) You do not need ANY special tools, like boot removers, etc. etc.
It's literally one of the easiest spark plug jobs to do.
3) The majority of the people posting above have no idea what they are talking about regarding the W211 E550 and spark plugs.
3/8 ratchet
spark plug socket (small)
3" extension (give or take)
8" extension (give or take)
T27 (I think) socket
3/8 universal
Dielectric Grease
You will be done in 45 minutes TOPS. Give a slight tug on each of your coil wire harnesses. If any of them come loose off the coil, you may have to wrap a zip tie around the coil and the end of the plug, just to make sure they are secure.
