Coil Packs failed, can I make it home?
Thread Starter
Member
Joined: Mar 2011
Posts: 95
Likes: 9
W221 S65, W140 S600, W210 E430, W126 300SD
Coil Packs failed, can I make it home?
Coil packs failed while out at the lake. CEL and very low power. I'm about 50 miles from home...can I drive it home? Any possible damage as a result of limping it back home or is it time for the long haul wrecker?
MBWorld Fanatic!
Joined: Jul 2012
Posts: 1,556
Likes: 15
From: Canada
07 E63 + 07 CLK63CAB
Not a good idea to run car for this time period with a bad coil pack.
Besides sending raw fuel into the cat system you will be washing the cyl of oil residue. Especially if the injector is still pulsing as it does not know the cyl coil pack is not firing.
Even if I am totally wrong with the thought, it would be more safe to get a coil pack from anywhere possible to get you home, OEM or a cheap parts store is better than limping home.
Good Luck
Besides sending raw fuel into the cat system you will be washing the cyl of oil residue. Especially if the injector is still pulsing as it does not know the cyl coil pack is not firing.
Even if I am totally wrong with the thought, it would be more safe to get a coil pack from anywhere possible to get you home, OEM or a cheap parts store is better than limping home.
Good Luck
MBWorld Fanatic!
Joined: Jul 2012
Posts: 1,556
Likes: 15
From: Canada
07 E63 + 07 CLK63CAB
Just a thought, check under the hood for rodent damage, was a issue a few months back where an owner had parked the car for a while and some squirrel or mouse got under the hood and ate some wiring for the coil pack or injector, not sure which but worth a shot, especially near the back fire wall.
Super Member
Joined: Jul 2013
Posts: 930
Likes: 24
06 SL65AMG, 13 Tesla Model S 60kwh, 02 Jaguar S-Type 3.0, 12 S550 4 Matic, 07 E320 Bluetec, 06 LX470
I mean you could drive on them, but yes the cats would be destroyed, it didn't matter for me since I was planning to swap the exhaust system when I was running into that same issue at the time.
MBWorld Fanatic!
Joined: Mar 2004
Posts: 5,768
Likes: 5
From: South FL & NYC
Your worst nightmare...
Sometimes if you cycle the key and shut the car down for some time the misfire will go away and will not present itself until you step on the gas hard and boost comes in. I have been caught in this situation and have driven home a good number of miles.
MBWorld Fanatic!
Joined: Aug 2003
Posts: 8,882
Likes: 1,212
From: In my garage
E55, GLS450, GL63, GLE350
Trending Topics
Super Member
Joined: Aug 2007
Posts: 649
Likes: 2
From: Las Vegas
3-pointed star
More details about cycling the key??
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Member
Joined: Jan 2010
Posts: 248
Likes: 15
From: Sacramento
W221 2013 S550 Rwd, W221 2010 S550 Rwd
Those cats are going to glow red with all that raw fuel and your going end up damaging 02s as well as fouling the plugs etc..... list goes on ... much safer and legit way is to tow it . Goodluck
Thread Starter
Member
Joined: Mar 2011
Posts: 95
Likes: 9
W221 S65, W140 S600, W210 E430, W126 300SD
Car is safe in the garage. New coil packs and plugs ordered from AutoZone. Got a 20% discount on my order and free Fedex shipping..out the door for $1500 with tax. Let the wrenching begin!
Thread Starter
Member
Joined: Mar 2011
Posts: 95
Likes: 9
W221 S65, W140 S600, W210 E430, W126 300SD
Lifetime warranty from AutoZone also. OEM part. Took me a little while to find it on their website also. I selected my type of vehicle first and then entered "ignition coil" in the search box. Fast shipping, OEM part, and a 20% discount for the online purchase.
Thread Starter
Member
Joined: Mar 2011
Posts: 95
Likes: 9
W221 S65, W140 S600, W210 E430, W126 300SD
FYI, I also replaced the rubber seal and gasket on the turbo coolant pipes while I was in there. Parts were cheap...like $5.00. With all that stuff out of the way already, it just made sense to do it. Both of my seals looked wasted after 69K miles. Only one of them had begun to seep a little, but I replaced them both. Best to do it while you have the thing apart.
If you do this, take special care in the order of reassembly as you replace the bolts for the intercooler piping that run below the coil pack. One and only one of the three bolts that holds the lines to the block ALSO holds the lower rear portion of the coil pack. Seems like you should bolt it all back on before installing the coil pack....uuuhhh no. Coil Pack will not fully seat with this bolt installed, and you have to remove whole enchilada....ask me how I know!
With the DIY posted on the M275 V12TT engine section of MBWorld this job was time consuming, but surprisingly easy with the proper tools. 6/8/10 12-point sockets and a 8mm 12-point swivel ratcheting wrench are must haves.
If you do this, take special care in the order of reassembly as you replace the bolts for the intercooler piping that run below the coil pack. One and only one of the three bolts that holds the lines to the block ALSO holds the lower rear portion of the coil pack. Seems like you should bolt it all back on before installing the coil pack....uuuhhh no. Coil Pack will not fully seat with this bolt installed, and you have to remove whole enchilada....ask me how I know!
With the DIY posted on the M275 V12TT engine section of MBWorld this job was time consuming, but surprisingly easy with the proper tools. 6/8/10 12-point sockets and a 8mm 12-point swivel ratcheting wrench are must haves.
Super Member
Joined: Jun 2014
Posts: 884
Likes: 23
From: U.K.
sl600
Is it the duralast ignition coils? Are these the OEM part from Autozone. Both sides for less than $1200 if these are OEM sounds like a deal too good to be true. They do say lifetime on them so it might be worth trying.
Last edited by F1BHP; Feb 6, 2015 at 11:28 AM.
Thread Starter
Member
Joined: Mar 2011
Posts: 95
Likes: 9
W221 S65, W140 S600, W210 E430, W126 300SD
Yes, they say Duralast coil packs on the AutoZone website, but that is just what is printed on the box it comes in. The coil packs themselves are OEM Temik branded, with the OEM part numbers, and are the latest "upgraded" version/part numbers, etc.
