The engine oil and filter change is for the M176.XXX engine. However, the WIS only has instructions for S-Class and G-Class vehicles with that engine. I have included both sets of instructions. The first (01) is for the S-Class cars and the second (02) is for the G-Class cars.

As a rule of thumb for direct injection engines, the spark plug should be indexed and torqued such that the open side of the ground strap is facing the fuel injector. The torque setting for the M176 engine is 22 Nm. You MUST use a Genuine or OE plugs.

Edit to add docs @streborx identified.

 

This is excellent. Thank you!

 

The part number for the spark plugs is 0001590500 or A0001590500. It appears that this plug is indexed. NGK 97566 and Bosch 96347 are both OE plugs and alternatives to Genuine Mercedes plugs. Personally, I have had better experience with the NGK plugs indexing properly.


This is the NGK OE plug, 97566.

 

I found the following WIS documents related to the M176 spark plugs through searching with a G550 (WDB463261):

AH15.10-P-0002-02A - Information on avoiding damage when replacing spark plugs - Model: All
AP15.10-P-1580C - Replace spark plugs - Model: 176 in model 167, 217, 222, 463 (also 177 in other models)
AR15.12-P-2008XGA - Remove/install ignition coils of left cylinder bank - Model: 176 in model 463 as of model year 2019
AR15.12-P-2009XGA - Remove/install ignition coils of right cylinder bank - Model: 176 in model 463 as of model year 2019

I can post the first 2 documents that apply to the 167 if there's interest, or they can be accessed directly by entering the document number in the WIS search facility. I suspect the last 2 documents are similar to what's required on the 167, and are different in describing what's required for spark plug access.

Curiously, none of the documents discuss indexing. The corresponding spark plug number spec'd in the EPC is A0001590500, as noted above, but there is no "do not substitute" notation. Perhaps inasmuch as WIS/ASRA/EPC is dealer targeted, the WIS editors assume OE parts will always be used, and any information about indexing and substitute parts is unwarranted.

Nevertheless, JettaRed's post immediately above should be observed (looks like RockAuto?).

 

I would be very grateful if you could post the two docs related to the 167.

 

Everyone should have a copy of WIS and EPC. I added the extra documents to the first post.

 

I missed that. Thanks!

 

JettaRed posted the first 2 docs. Here are the coil procedures for the 167.

 

Absolutely! My version runs under VirtualBox. Do you have WIS direct access via BenzNinja?

 

Yes, and it is awesome. It runs natively under Windows 10, which he provides. (I've not tried Windows 11 and won't -- no need to.) I got the Vbox versions on eBay in the past and could never get the file transfer and printing to work reliably. @BenzNinja will remote in and fix any StartKey issues if it ever gets corrupted. I only use the laptop for XENTRY and WIS/EPC stuff. I did install Chrome only to be able to send files to my OneDrive, which I then access from my Mac. WIS/EPC, as you probably know, only likes Internet Explorer. So, automatic updates needs to be off.

 

Great! I updated the first post to specify the torque setting as 22 Nm.

 

That means the new Edge browser (chromium) probably doesn't work?

 

Correct.