C Class Spark plug Replacement

[@jamiesmith2153]

Thank you for the video I just finished changing mine out and biggest trouble was getting the spark plug wire off the spark plug took me 3 hours taking it easy. 2014 c350 sport

[@vikingrobot4179]

You Can use a special set of pliers that have a half moon shaped loop at each end of the tool at an angle. It loops around the spark plug boot and you squeeze/pull otherwise you’ll fight them.

[@forensicdoc6241]

Thanks for doing this! Only video I’ve seen of my engine same type. Very helpful.

[@deviousJames29]

Same problem

[@e63Amgg]

Make video on how to take everything off struggling with ecu bracket

[@dcasteaux9181]

Good video. Glad you didn't remove the plenum assembly (cover with the 'V6' logo at 0:47) like some videos show - if you do remove it you need to get new plenum seals (don't re-use the old ones!) and they are not cheap else they will leak air and the engine management light will come on after a week: I know that because that's what my Mercedes dealer did 😣

[@larryreno8293]

That’s not true. I’ve reused them many times without a problem. I suspect they were not in place properly when the upper intake was installed.

[@DA-ql3vt]

I just did it without removing the manifold and am glad I didn't go through the extra trouble. That rear plug didn't seem so hard to me. I'm sure watching this video saved me a little time though.

[@slidin5672]

Do you gotta torque down the new spark plugs?

[@moisesperez4659]

Spark plugs are indexed and must be torqued.

[@rugpull500]

I like how they make u take apart the whole car just to do a simple job gotta love Mercedes

[@larryreno8293]

What? This is easy compared to many other manufacturers.

[@bobkovach1426]

Dude, you do this at 100K miles...no biggie.

[@mboss_f8618]

Great video. I do agree rear plug on driver side is pain in the ass to remove. After struggling for an hour I was unable to remove it. So now I have 5 new and one old plug lol. Lets see if I get any misfires in future. Thanks for making this video. Appreciate it man!

[@thor294]

They have a special tool for that airbox clip it makes life a lot easier

[@brassmule]

It looks like a big Clic-R clamp?

[@thor294]

@@brassmule something like that I forget the name

[@brassmule]

@@thor294 It's definitely a Clic-R, and you're right, the tool for those makes it very easy to unclip and re-clip them. Just did this job on a c350 today and confirmed it.

[@chuguanyu]

How to free the wires for the computer from the bracket you removed? There is a “screw” on the bottom the zip tie that’s screwed onto the bracket.

[@rforracing]

LOL such a nightmare changing spark plugs on this engine.

[@UnicycleWheelie]

Yeah tell me about it, on my Honda fit, it was a cake walk lol

[@Npua_Peb]

Why didn’t you show up all the steps but I guess it is what it is

[@inakalimba9428]

Camera provided a clear view of this engine, only missing the real -time removal of the wiring harness and all it's weird clips. What tools are best for that?

[@grumpy7724]

Thanks for posting! I was just looking at mine and wondered how the computer came off. Looked to me like it just pulled off and you confirmed it!

[@taufanfatawi3717]

Do you need to unplug battery. Worried about unpluging wire from computer.

[@UnicycleWheelie]

Well, unplugging the battery resets your clock and radio stations, which is a pain. First rule when doing anything to the ecu is to disconnect the battery. Just like any computer you need to unplug it before you work on it

[@slidin5672]

Good video my guy thinking of doing it myself instead of taking it to a shop! My only concern is do you have to torque the new spark plugs to a certain lb?? And do you have to change the coil packs also or can you just do the spark plugs?

[@UnicycleWheelie]

Depends on the miles, my car had 60k, 23 Nm/17 ft.-lbs. on the plugs. 9 Nm for the coil pack bolts....NGK recommends a torque range of 18 ft-lbs to 21.6 ft-lbs for their plugs.

[@slidin5672]

Okay thanks for the response and the lbs to use! I think ima go with the Bosch spark plugs any difference between oem and Bosch or should be good?

[@UnicycleWheelie]

@@slidin5672 OEM have a resistor

[@slidin5672]

Do you have to disconnect battery when removing the ecu to get to the driver side spark plugs?

[@UnicycleWheelie]

@@slidin5672 I would just to be on the safe side

[@BMWI-gk9wh]

Damn didn’t take off the plenum?!

[@MedPaz]

How do I put that clip back 1:20

[@UnicycleWheelie]

For the air intake clip, I used needle-nose pliers

[@armandoortiz6943]

Removing the coil is giving me a problem, can you tell me if this is normal, don't want it to break inside if a i pull on it too much?

[@UnicycleWheelie]

some of my coil on plug was hard to pull off, just use your judgement, that is why I used dielectric grease on the boot of the coil packs. they fit very snug

[@carlosaguilar1945]

Smart man!! Good shiiii!!!

[@C435I]

Good video

[@C435I]

Doing the coil pack n plugs on my c300 right now

[@devongrant1076]

what size socket did you use to remove the ignition coils 2:25

[@UnicycleWheelie]

E10 socket

[@devongrant1076]

@@UnicycleWheelie do you use the same size to remove the spark plug itself?

[@UnicycleWheelie]

Need a 14mm deep 12pt thin wall socket. I used Part # 22814 SKU # 814164 from AuroZone @@devongrant1076

[@sojourn4642]

how the fuck did you take off the ecu

[@UnicycleWheelie]

Pull up, its snug

[@jakesanton2527]

Tool List Please!!!

[@UnicycleWheelie]

Added

[@jakesanton2527]

@@UnicycleWheelie Thank you so much! Love the content.

[@BMWI-gk9wh]

Your better off taking off the plenum and having full access???? It’s 4 bolts and you will have full access to all plugs and coils. ? I get you got to buy 3$ gaskets and swab em if you take the plenum off but shit this is a 5 hour job vs a 2hour lol. Take off the plenum and be done man.