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You'll need 7-8 Quarts of European Spec 0W-40 motor oil, oil filter, 32mm socket, 17mm socket, Mityvac MV7201. Dog not included
I got this off of Sears website for a little less than $90.
Start by inserting larger tube into blue ringed inlet as shown.
Remember to close the top!
Attach smaller tube to larger tube via connector as shown.
Make sure this is pushed down to insure that it is on suction.
There are six clips underneath (location shown in orange circles) you need to release in order to get this portion of the engine cover off.
Start by releasing the front set of clips.
Move to one side and release clips.
Complete by releasing opposite side of clips.
Lift off engine cover.
You will need the 32mm socket for the oil filter cap and a 17mm socket to loosen the oil cap.
Loosen the oil cap with 17mm socket if needed. Removal of oil cap is important to improve flow.
Remove dipstick
Insert tube of Mityvac into the shaft of the oil dipstick. Be sure to push all the way down until you no longer push down.
Pump a few times to start flow and pump periodically to continue flow.
If using the MV7201, you should have removed about this much oil from the crankcase.
Remove tube from dipstick shaft.
Insert tube in a container in which you plan to store the old oil.
Reverse flow of pump by pushing up. Pump a few times so it will output old oil into container. While this is going on, continue with the oil change and checking flow periodically.
Insert dipstick
Use 32mm socket to loosen oil filter cap.
Remove oil filter cap
Pull old filter out of oil filter cap. This may be a little difficult, but it will eventually pop out.
Mmmmm, tasty
At this time, replace rubber washer on oil cap and insert new filter. It will click into place.
Screw oil filter back onto vehicle. tighten by hand and then 25nM with a torque wrench
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
You should get in the habit of removing/replacing the old filter first. Another open hole on the top side of the engine will ease evacuation of oil. And you should get 10qt to be on the safe side. I get 8-9qt out through the dipstick with every change, sometimes more (my last change I completely filled my MityVac MV7201 - 10L=9.5qt). 7-8 would leave most people well short.
You should get in the habit of removing/replacing the old filter first. Another open hole on the top side of the engine will ease evacuation of oil. And you should get 10qt to be on the safe side. I get 8-9qt out through the dipstick with every change, sometimes more (my last change I completely filled my MityVac MV7201 - 10L=9.5qt). 7-8 would leave most people well short.
I bought a case so I had 12qts ready. I'll remove the oil filter first and see if that helps. I got about 8qts our before it started sucking a lot of air. How did you get 9.5qts out? Does 10qts sit in the engine?
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Changed my oil today for the first time in 2yrs. Have a little update here that I learned from changing the oil in my GLK.
So there’s a special MB adapter to attach the MityVac main (biggest) hose directly to the dipstick. It creates an airtight seal to the dipstick tube and gets the oil out FAST and completely. None of the smaller MityVac hoses would work for my GLK, and I had an epiphany after looking at pics of the MB adapter. Here’s the big news (for me anyway).... the MityVac already comes with the correct adapter. And it works for the C63 too. I just got over 9L out in about 4min which was shockingly fast.
Check it out. The black stepped rubber adapters between lengths of MityVac hose actually ARE the dipstick adapters themselves. All you have to do is drill out the wider side hole a little with a 5/16 bit so that the large main hose fits snug. The other side, just jam it into the dipstick and it stops at the first step and creates a completely airtight seal.
So no more fishing those small diameter hoses to the bottom of the pan, use the dipstick tube itself to pull up the oil. Hope this helps someone, it’s made my oil changes much faster and seems to get more out as well.
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Probably not, although it is creating a vacuum throughout the system versus just sucking oil from the pan (with the oil fill cap off of course), so I’m sure it’s pulling oil from places the tube wouldn’t normally get. Either way I’m not bothered with a quart of old oil mixed in with 9 quarts of new at 2000mi intervals. Oil analysis continues to look great, and my engine is quiet as can be.
The pan holds 7.8L and the dipstick tube doesn't bottom out so it must be creating a vacuum somehow to pull over 9L out.
When I upgraded my front cooler I emptied the OE front cooler via the drain plug and let it drain over night. The arch cooler still almost dumped out 500mL of oil when I yanked the line.
2017 GLA 250, 2011 C63 P31 (p30 w/ lsd) (in repair), 2005 C230 Sport Eurocharged, 2003 C320~sold
Originally Posted by BLKROKT
Changed my oil today for the first time in 2yrs. Have a little update here that I learned from changing the oil in my GLK.
So there’s a special MB adapter to attach the MityVac main (biggest) hose directly to the dipstick. It creates an airtight seal to the dipstick tube and gets the oil out FAST and completely. None of the smaller MityVac hoses would work for my GLK, and I had an epiphany after looking at pics of the MB adapter. Here’s the big news (for me anyway).... the MityVac already comes with the correct adapter. And it works for the C63 too. I just got over 9L out in about 4min which was shockingly fast.
Check it out. The black stepped rubber adapters between lengths of MityVac hose actually ARE the dipstick adapters themselves. All you have to do is drill out the wider side hole a little with a 5/16 bit so that the large main hose fits snug. The other side, just jam it into the dipstick and it stops at the first step and creates a completely airtight seal.
So no more fishing those small diameter hoses to the bottom of the pan, use the dipstick tube itself to pull up the oil. Hope this helps someone, it’s made my oil changes much faster and seems to get more out as well.
What?! This is awesome! I definitely have to try this out! Thanks!
On a side note for everyone make sure to do your oil change with warm oil. Let it sit for a while after running to let it cool off and drain from the top end to the pan. If you ever forget and start doing it cold.... you won't forget again because it will take FOREVER!
2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Originally Posted by Jasonoff
The pan holds 7.8L and the dipstick tube doesn't bottom out so it must be creating a vacuum somehow to pull over 9L out.
When I upgraded my front cooler I emptied the OE front cooler via the drain plug and let it drain over night. The arch cooler still almost dumped out 500mL of oil when I yanked the line.
Measured the old oil quantity more carefully and it was 8.75L. So still more than the pan which means it must be sucking oil out of the coolers as 1L sounds about right for both of those...
Maybe this is why Merc insists on using topside extraction, because with their special adapter (or this), you seem to be able to get all of the old oil out.
I know this is an older post but I wanted to say thanks to the OP and BLKRKT for this tip on the use of the MityVac and adapter adapter. I did my first oil change (on this car) yesterday and it was extremely easy using this method.
One thing I did want to add was that after using this method, I was curious to see if there was any oil left in the pan. I used the thinnest of the MityVac lines and stuck it down the dipstick tube until it bottomed out. I got a very small amount of additional oil. However, it was very difficult to pull the tubing back out of the dipstick tube - it almost felt like the tubing was catching on something on the way back up. I was concerned about breaking off the tubing but thankfully I was able to pull it out. In the future, I’ll only be using the method with the rubber plug.
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I definitely have to try this out! Thanks! 
