eatbeef40

A DIY with pictures would be awesome, I figured the passenger side would be fairly easy, but what about the driver side? What tools will I need for this procedure?

dlbehrns

Check the DIY thread however, remove the coil packs so you have room to work. There is a plug wire removal tool which is basically a 17mm(I think) offset open end wrench used to remove the wire from the plug and the rest is pretty much straight forward. There is also a flex extended socket for the plug that can make life easier. Here's a pic on ebay
http://www.ebay.com/itm/Mercedes-Spark-Plug-Wire-Wrench-and-Socket-Tool-112-113-/370764751584?pt=Motors_Automotive_Tools&hash=item56534d22e0&vxp=mtr

jonUF02

Pretty straight-forward. It's the same on any 55, 430, or 320 engine, I'm sure there is a pretty write-up with pics somewhere, but ft you need pics for this job, then maybe you should take it to a pro...

Hitman0187

I think its a valid question, the drivers side does look like a total nightmare, that tool on ebay looks like it would be well worth it cost.
wonder if it can be "rented" from autozone or pep boys

jonUF02

If it's not used on a Chevy or a Ford, then probably not a tool that can be "rented" or even purchased at your local auto parts store.

I really didn't have a problem with standard sockets, extensions, 17mm wrench and patience.

eatbeef40

Which spark plugs should I get? On autohausaz I see part 6702 "Bosch Platinum" for $2.75, and part 7422 Bosch Platinum OEM for $5.18.. I really am tempting to get the $2.75 but is it recommended to get the OEM spark plugs..?

Also, do I need anti seize? If so, which one? Anti Seize for copper or for silver grade?

MarcusF

If the car has Xenons, removing the headlamp washer fluid tank frees up a lot of room.

The 17mm wrench that DL referred to makes removing the wires a breeze. I also own a wire puller, and that wrench is a much better tool on a Mercedes. That wrench is also used to adjust valves on a diesel, so don't be surprised if you see that wording in the description. If you simply pull the wires by hand, there is a very good chance they will be damaged.

Also like DL said, unbolt and slide the coil packs back. I leave the wiring harness attached.

The hardest plugs to get to are the center plugs on the driver's side and the driver's side rear. I use a swivel head ratchet and that makes it easier to R&R the plugs. For the driver's side rear you'll either use a mirror or the feel method. I just feel them.

As for tightening, you're not getting a torque wrench on many of those of those plugs. Bosch has a method to properly tighten their plugs. A picture is worth a thousand words, and it is dead simple, so just take a look here.

jonUF02

Bosch 7422 is OEM. I went with those from Autohauz. I always use anti-sieze, just the little packet at the counter of your local auto parts store, small dot on each one. They don't need to be too tight. Resist the urge to put too much force on spark plugs. Nice and snug should do it.

eatbeef40

Can i get the bosch platinum 6702? will those do fine? They're half the price of the OEM's.

jonUF02

It probably won't make a difference, but I think everyone looking at this will agree that the original plugs are your best choice.