Changing the spark plugs 2014 E350
Member
Joined: Jul 2016
Posts: 117
Likes: 13
From: Take two of these and call me in the morning
2015 E-Class
Not being mean or anything as I certainly wouldn't want to pay $700+ for plugs but if unable to pull engine cover then maybe one shouldn't attempt any mechanical service 
Newbie
Joined: Dec 2008
Posts: 7
Likes: 2
From: Tulsa, OK
E 350
I can understand the desire to reuse the engine cover so caution can save some $$$. I changed my plugs at 60K and they didn't look too bad so I plan to go to 120K with the new ones.
A little freebie I'll throw in: When starting the new plugs place a 4" - 6" piece of vacuum hose on the plug to reduce the danger of "cross-treading". Once the plug is installed and prior to torquing just pull the hose off.
OBD
A little freebie I'll throw in: When starting the new plugs place a 4" - 6" piece of vacuum hose on the plug to reduce the danger of "cross-treading". Once the plug is installed and prior to torquing just pull the hose off.
OBD
Senior Member
Joined: Mar 2004
Posts: 264
Likes: 3
From: OKC, OK
2022 GLE 450;
After reading the service bulletin linked above and seeing that the intake manifold needs to be removed on 2012 and newer E350s, I now see why it's so expensive. A local indy mechanic quoted me $600 and told me the Star manual describes it as a 5 hour process. The dealer also told me $712 and said 4-5 hours without looking at the book.
The earlier E350 didn't require removing the intake manifold and it would be just as easy as the other dozens of cars I've changed plugs on. I plan to wait till 70,000 miles and have them check for carbon deposits on the intake valves at the same time while I could possibly get those cleaned under warranty at the same time.
The earlier E350 didn't require removing the intake manifold and it would be just as easy as the other dozens of cars I've changed plugs on. I plan to wait till 70,000 miles and have them check for carbon deposits on the intake valves at the same time while I could possibly get those cleaned under warranty at the same time.
Newbie
Joined: Feb 2016
Posts: 11
Likes: 6
E350
2013 E350 W212 Engine 276.952 Spark Plug removal at 60K service interval
I read #13 posted by Konigstiger This PDF was a great guide....
I have removed #1 Front Engine Cover
I have removed #2 Air filter housing.
#3 Intake Manifold Can anyone post how they removed the intake Manifold...
With the #2 Air filter housing removed I was able to pull the T1/1 ignition coil. My standard Deep well 5/8" socket will not go down into the spark plug well inside the head. What brand or where did you purchase the correct Spark Plug socket?
Looking in the EPC site they call for a tool W 278 589 00 09 00 Spark Plug Wrench. I'm not finding it online to purchase..
Spark Plugs. in this E350 engine 276 with 3.5 Liter I haven't seen anyone posting much about what type of spark plug they are using or are considering. My research shows Denso 3495
Question for Konigstiger .... are you accessing the PDF inside the EPC site? I paid for a subscription but I can't see where those PDF's are located... I was hoping to look for additional details.
Devoir
I read #13 posted by Konigstiger This PDF was a great guide....
I have removed #1 Front Engine Cover
I have removed #2 Air filter housing.
#3 Intake Manifold Can anyone post how they removed the intake Manifold...
With the #2 Air filter housing removed I was able to pull the T1/1 ignition coil. My standard Deep well 5/8" socket will not go down into the spark plug well inside the head. What brand or where did you purchase the correct Spark Plug socket?
Looking in the EPC site they call for a tool W 278 589 00 09 00 Spark Plug Wrench. I'm not finding it online to purchase..
Spark Plugs. in this E350 engine 276 with 3.5 Liter I haven't seen anyone posting much about what type of spark plug they are using or are considering. My research shows Denso 3495
Question for Konigstiger .... are you accessing the PDF inside the EPC site? I paid for a subscription but I can't see where those PDF's are located... I was hoping to look for additional details.
Devoir
Last edited by Devoir; Dec 31, 2016 at 10:04 PM.
Out Of Control!!
Joined: Jul 2003
Posts: 15,901
Likes: 4,632
From: North Scottsdale, AZ
'71 Pinto
Manifold, see attachment.
Wrench, drop W search 278589000900
Spark plug OEM part 0041598103
EPS covers parts only, owners can access STAR – WIS by subscribing (24 hours $60) here: https://www.startekinfo.com/StarTek/ allows you to download unlimited current VIN specific instructions covering every aspect of vehicle.
Wrench, drop W search 278589000900
Spark plug OEM part 0041598103
EPS covers parts only, owners can access STAR – WIS by subscribing (24 hours $60) here: https://www.startekinfo.com/StarTek/ allows you to download unlimited current VIN specific instructions covering every aspect of vehicle.
Senior Member
Joined: Jun 2012
Posts: 431
Likes: 44
From: Portsmouth, VA
2010 E350, Sold 1998 C230
Wow, you have to remove the manifold to do plugs? Very happy to have a 2010 in that case. I've done lots of maintenance over the years on cars and everything else, but I'd be a little dicey on pulling the manifold on one of these beasts. Do something wrong and you may end up with a vacuum leak or some other issue and you may have to repeat the process. As cheap as I am, this is probably one I'd pay to have someone else do.
I wonder if other direct injection engines make you remove the manifold to access the plugs? To me, this is poor engineering.
I wonder if other direct injection engines make you remove the manifold to access the plugs? To me, this is poor engineering.
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Newbie
Joined: Feb 2016
Posts: 11
Likes: 6
E350
Konigstiger
Many thanks for you assistance and direction removing the intake .......
Spark Plug socket update...... With a flashlight and a micrometer I measured the spark plug well it is approx .810" in diameter. After looking closely I noticed the spark plug wasn't the standard 6 sided hexagonal shape. Thus none of my attempts using a 6 point socket worked.
I have just discovered that my 12 point 9/16" deep well socket will slide down into the well and fit over the spark plug. However it appears to be loose or not a snug fit...... I'm now searching for a 14mm socket with 12 points is such an animal exists....
My neighbor is an Indy mechanic..... I'll see if he has such tool in the garage....
I love a challenge and especially working on cars.....
Many thanks for you assistance and direction removing the intake .......
Spark Plug socket update...... With a flashlight and a micrometer I measured the spark plug well it is approx .810" in diameter. After looking closely I noticed the spark plug wasn't the standard 6 sided hexagonal shape. Thus none of my attempts using a 6 point socket worked.
I have just discovered that my 12 point 9/16" deep well socket will slide down into the well and fit over the spark plug. However it appears to be loose or not a snug fit...... I'm now searching for a 14mm socket with 12 points is such an animal exists....
My neighbor is an Indy mechanic..... I'll see if he has such tool in the garage....
I love a challenge and especially working on cars.....
Junior Member
Joined: May 2017
Posts: 22
Likes: 7
2013 E350 Sedan
Konigstiger
Many thanks for you assistance and direction removing the intake .......
Spark Plug socket update...... With a flashlight and a micrometer I measured the spark plug well it is approx .810" in diameter. After looking closely I noticed the spark plug wasn't the standard 6 sided hexagonal shape. Thus none of my attempts using a 6 point socket worked.
I have just discovered that my 12 point 9/16" deep well socket will slide down into the well and fit over the spark plug. However it appears to be loose or not a snug fit...... I'm now searching for a 14mm socket with 12 points is such an animal exists....
My neighbor is an Indy mechanic..... I'll see if he has such tool in the garage....
I love a challenge and especially working on cars.....
Many thanks for you assistance and direction removing the intake .......
Spark Plug socket update...... With a flashlight and a micrometer I measured the spark plug well it is approx .810" in diameter. After looking closely I noticed the spark plug wasn't the standard 6 sided hexagonal shape. Thus none of my attempts using a 6 point socket worked.
I have just discovered that my 12 point 9/16" deep well socket will slide down into the well and fit over the spark plug. However it appears to be loose or not a snug fit...... I'm now searching for a 14mm socket with 12 points is such an animal exists....
My neighbor is an Indy mechanic..... I'll see if he has such tool in the garage....
I love a challenge and especially working on cars.....
Newbie
Joined: Feb 2016
Posts: 11
Likes: 6
E350
Let's just say I'll post a How to do it..... round 1 the dealer sold me the wrong plugs and the engine didn't like them so I put the old ones back in .... I'm waiting a a replacement set... I have a really cool installation guide with pictures.....
Junior Member
Joined: May 2017
Posts: 22
Likes: 7
2013 E350 Sedan
sounds good! I look forward to using your guide. Haha.
Junior Member
Joined: May 2017
Posts: 22
Likes: 7
2013 E350 Sedan
Is this a good price?
Junior Member
Joined: May 2017
Posts: 22
Likes: 7
2013 E350 Sedan
Seeing how they made the mistake they said they would honor the price of $380....
(parts and labor)
Super Member
Joined: Feb 2013
Posts: 580
Likes: 62
From: Maryland
2013 E550 4Matic
I brought the parts to them, which came out to about $80 from ebay I think... OEM parts in OEM packaging. I guess yours would be $60, or you could have 2 spares laying around, which wouldn't hurt. So all in all, I was in about $380 as well... still a good deal lol
Newbie
Joined: Aug 2011
Posts: 9
Likes: 4
2008 ML550 2013 E350 4Matic Sport
