Troubleshooting Air Conditioner Not Working

I tested the wire to compressor and it has power. Also, my OBD tool was able is able to transmit data from the compressor turns on and shuts off. It shows the unit go from 0% to 70% when it is powered on, including showing the voltages as I mentioned 12-13V.

This is what my compressor looks like. It's got a metal piece on the front, which seems to be a clutch (which is not engaging). The product info is DENSO ASSY 447220-8843. It seems to be for European c-class models.

What do you think, does this compressor have a clutch or not?

Ok, thanks for confirming that. I thought that hub-looking thing was a clutch this whole time. That helps a lot!

I'll definitely be studying the video. I'll replace the compressor and let you know the results afterwards. Hopefully this solves the problem!

How many ounces of oil come with the new Denso unit? And what kind of oil did you add to the new unit before installing.

So when you add the oil to the compressor, that means you won't add any additional oil when you recharge with 134a right? Because presumably, it should have the oil from the Denso unit + the 2 oz that you added.

Im still waiting on the part, should arrive by this weekend.
Do you know the size o-rings you needed for the hoses (the o-rings that you replaced)?

Not done anything w compressor, or touched drive belt or anything

Ok, I'll order the part. That means it's gonna be a while before I get to the compressor.

I did a preliminary check to try and locate the starter and see how I will access it once I get that part. It doesn't look so straightforward. I got under the vehicle to see it, and I couldn't see really even how to get it out.

Just take a look at these diagrams. How do you get to it? It looks like #37 and #17.
Let me know if you instructions or ideas on how to approach this. I think accessing the starter was easier on the Ford.

Oh. So these were the images I was referring to. I realize that's probably not the M271 engine, but the layout is similar. I pulled that from a website that was written in Russian, so I don't really know what it says since I don't speak/read Russian.
Problem is, you don't really see what it looks like next to the bell housing from these pictures. I'll post some pictures from my car later on this week when I get a chance.

Haha, I'll keep that in mind. Well I'm definitely trying to learn to become talented. Things are definitely challening on this car--intimidating but rewarding when you get it right.

So I've a snapped a couple photos to give you an idea what we're dealing with. The first two, are just to get you oriented. And then I took some close-ups so you can see how tight the space is.

If you look above where the hose are bolted to the bell housing, and above and adjacent to the steering coupler, you can see the starter. Then above and adjacent to that is the supercharger muffler and supercharger.

So the question is, how do you get it out?

What I know is, the intake muffler DEFINITELY has to come out, since it would not be possible to get the starter out even if you managed to miraculously unbolt it.

So how do you get the muffler out. Does the whole supercharger come out too?
Or is there a another way to squeeze out the starter?

Sorry the first two photos I posted, posted upside down for some reason, which is extra confusing. We're on the left-side/driver's side. So the top of the photo, is the bottom of the vehicle in those first two.

I got the tool, but where is the clamp are you talking about? The starter is behind and below #100 in the picture.

http://www.mbpartsworld.com/showAssembly.aspx?ukey_assembly=1073214&ukey_product=7766625