ShoremNJ

I have 117,000 and needed new plugs. Deal charged $300. US, only because did an oil change so the labor was less. He originally quoted $375.

mac911

Well, good to have that done. Do you feel a difference?

I'm very interested in your opinion. At 117,000 miles, have you had any issues with your W204?

ShoremNJ

I do feel it is running smoother and better gas mileage on my first highway trip. The car has been good, only last month the ignition switch failed and had to be replaced for $750.00 USD. Other than that, only normal maintenance tires at 65,000 brake pads at 90,000.

jctevere

Wow, original pads lasted 90,000 miles, and tires 65,000? Must have been a ton of highway miles?

ShoremNJ

90% highway driving and I use the cruise control for braking also.

aowhaus

what kind of spark plugs did they install?

I had Beru Ultra X Titan installed on my last car and I really liked it. Beru is used in many German cars, but upgrading to the Ultra X Titan platinums was a nice change.

ShoremNJ

I really don't know, the dealer did it.

grane

+1

Bosch, Beru, and NGK platinums are all good choices, dealers tend to use the last, but the Bs are preferred.

Don't waste money on the super multiple electrode plugs they usually are not the right plug for the job.

Tip
If you have breather hoses replace those and inspect the VC gaskets for leaks. Take your time!

lfilomeno

I am curious: Can you change the sprk plugs at home or this is something th stealership has to do? Does the same applies for the brake pads? Please reply at your earliest convenience. Thanks.

jctevere

It is possible to change spark plugs by yourself - but usually not the easiest task and should be left to the dealers unless you are mechanicall inclined and know a bit about how cars "work". If there is a DIY you can do it, but still not easy.

However, brake pads are VERY easy to change, as rotors, and almost anyone can replace it themselves, and the DIY listed in this forum makes that even easier.

mac911

Is there something that makes the spark plugs hard on this car? Honestly, it seems easier than brakes just for the sake of not jacking the car up. I have done spark plugs many times, but not on a Mercedes.

I would say though...one should make sure they tighten everything back to the exactly right torque.

Spec_Davis

yea i would like to know what our stock plugs are

mac911

I believe the owners manual narrows it down to 2 models of spark plugs. It might even narrow it down to 1, depending on the engine.

Imageboi

spark plugs are super easy if comparing it to changing the brake pads... if you can do brake pads you definitely can do the spark plugs...

it's basically popping off the engine covers and then take off the coil packs then unscrew the plugs.. reverse to install..

plugs available i searched on ecstuning and came up with these...

http://www.ecstuning.com/Mercedes_Be...ugs/ES2011980/

http://www.ecstuning.com/Mercedes_Be...ugs/ES2006432/

lfilomeno

Thanks for your reponses guys. Will search the forum for DIY guides on Brake pads changes and Spark plugs.

jctevere

I don't think that there is a DIY for spark plug replacement yet for w204 models. Which is why I said it might not be the easiest for someone to do with little to no experience.

It isn't "impossible" but you probably need special mercedes tools as the w203 (previous c-class needed). I am unsure on procedure for the w204 but for w203 you had to remove the MAF and air box housing, to get to the spark plugs. Hopefully in this redesign they are simply right under the cover as suggested and are an easy fix. But whoever does change them, please make a DIY!

mac911

Also if you plug the spark plug numbers from the owners manual into Amazon, I think they normally have one of them in stock with free shipping.

I would suspect that changing the plugs on a W203 that had the 2.5 liter, 3.0 liter, or 3.5 liter M272 V6 would be nearly the same than the W204 with the same engines.

Some of those repair books for the W203 might even be helpful, if it includes the M272 that was used in the generation's later years.

ImageX

i wonder what the stock spark plugs are that last that long.. cause most platinum and iridium plugs are 50k to 75k or wonder if it's just our engines are that much easier on sparkplugs to make them last that long...

also i read on someone elses thread that did change them and they said it was torx that held on the coilpacks... what special tool are your referring to cause i'm not familiar with the w203 models.. if anything i mite just change my sparkplugs at 50k and see if i notice a difference and for a better piece of mind as far as gas consumption goes...


Also look on the ecu removal thread in the guides and see it's torx right there https://mbworld.org/forums/c-class-w...oval-pics.html

aowhaus

Spark plugs are easy to install if they are easily accessible.

I can also vouch for ECS Tuning, I have bought from them many times for my Audi/VW and they sell excellent products and have great customer service. Unfortunately, there is not many products available for our C on their site.

matthew121170

So has anyone successfully changed their spark plugs yet? I'm looking for a DIY that can tell me things like do the plugs come pre-gapped or do you have to gap them. If you do what's the gauge? What's the correct torque setting or is just tight enough tight enough? I never used to use a torque wrench on my older cars I just tightened them by hand and then gave it a couple of gentle turns to tighten them good. I used an anti-size compound on the threads, do you still need to do that? Are there once (towards the back maybe) that are hard to get to? Special wrenches? I know the torx for taking off the coil packs, got that covered.

Stevedotmil

Hand tight plus a 1/4 additional turn is usually the guideline but look it up just to be sure. Use a piece of rubber hose about 12" long with enough diameter to insert the coil end of the plug into it to avoid cross threading into the aluminum block. Anti seize is always a great idea especially when connecting two different metal types. Always heck the gap of new plugs even if they say that they are pre-gapped. I don't know the person who built them so why wouldnt I.

pkursani1

I found this diy spark plug video on youtube which explains and show exactly how to remove and change the spark plugs on the current w204 mercedes. Please watch the video as it explains the procedure on two cars, if you wanna watch only w204 fast forward to the min 5:59 ok. Enjoy

ImageX

what were the part numbers for the ngk and beru and the bosch you guys used??

pkursani1

http://www.boschsparkplugs.net/resul...tTypeID=1&pt=1

This is bosch OEM

maverickvii

On a side note, 117k for 5yrs is impressive...getting the most out of the girl.