Spark Plug Life? - PeachParts Mercedes-Benz Forum

DavidF.C280 · #1 01-08-2004, 05:00 PM

Everyone,

Just Curious, I expect to be "Semi" Struck Down on this for not doing it at 60K. but....

ML 320, now has 83K on it. The CEL came on on Monday,

Went to the Shop and they said new MAF Sensor. I have a 100K extended Warranty, so That took care of that.

However they fitted it and said there was still problems, cut the story short they told me the plugs needed changing...and 'shock horror'

they were the original plugs "Which should have been done at 60K", and that was also causing the problem with the CEL.

Now Correct me if I am wrong, but isn't recommended change for the plugs on the ML at 100K.

I was planning to do it myself, but well it was in, and I thought may as well get it done anyway. To be honest after reading in another thread that the wires need the special tool to remove, maybe its just as well I got someone else to do it, but thats for another discussion.

So my question, should the plugs need changing earlier that the recommended 100K, or was I on another planet when I read that?

As always ... Many...

A t D h V a A n N k C s E

David

DavidF.C280 · #2 01-08-2004, 05:15 PM

Well you can reply and say rude things, and/or kick my backside and tell me what a fool I am. In fact I was almost tempted to delete this post, but hey it may serve as a reminder to others.....

Just realised that its 100K OR 4 years. As the car went on the road brand new in November 99, then it is about time for them to be changed.... Now going to check what else needs doing at 4 years......

David.

Garret M. · #3 01-08-2004, 10:26 PM

Planning to do this myself in the spring, what special tool is need to take off the wires from the plug? Is there any type of work around?

Tom Hock · #4 01-09-2004, 08:54 PM

I changed my plugs last summer. It is really not a big project considering how much you can save over what the dealer charges. I bought a standard spark plug boot removal tool from Harbor Freight for a few dollars that worked fine. I did remove the coils at each cylinder after the boots were removed to give me more room to work, but I found no need to remove the fender liners as some recommend.

Gilly · #5 01-09-2004, 09:20 PM

Garret
The tool MB wants you to use is an old M110 engine valve adjusting wrench. It's an open end 17mm wrench that you use on a groove in the metal end, then you can pry it against the valve cover to lever off the plug wires from the plugs. Works pretty slick. A normal 17mm open end won't work, this tool has a pretty deep offset and aloows you to get in there.
Tom says a plug wire pulling pliers worked for him, i would imagine it has a pretty steep angle to it, beacuse there isn't a whole lot of room to the sides of the engine.

Gilly

myarmar · #6 01-10-2004, 06:21 PM

HAZET Valve Adjustment Wrench for M110 engine.
p/n 110 589 01 01 00

kenyee · #7 01-10-2004, 10:28 PM

Are there any other tools needed for the spark plug replacement?

I also thought you had to get at a few of the spark plugs from underneath the engine which is why removing the fender lining was needed?

Gilly · #8 01-11-2004, 03:39 PM

No other "special" tools needed, just the obvious; spark plug socket and ratchet, torx socket to remove the coils.

Gilly

kenyee · #9 01-11-2004, 03:56 PM

Generic spark plug socket/rachet should work as well?

thanks Gilly.

ken