I am not convinced there is a 'good' charger made anymore, have some old ones that keep trucking.....I have had most of the modern ones....the bigger the amperage, the bigger the $ hit when they fail it seems.
Lisle oil filter wrench is almost always the best....for a reason
If you have to gorilla it nothing beats a seatbelt strap wrench, but it will crush the can and is slower.
MB dealers in the US don't generally even use the fleece filters themselves. Don't know if its because of price or availability. When I got some for the wife's 2017 300E I could not even find any fleece media ones, so just got the MANN normal ones...I change every 5000 so don't see an issue anyway.
Ours is a G25S-2 with a Hercules propane engine - we it has use 15W-40 and it has 5800 hours so far. It has a hard life so I wouldn't wanna go thinner.
Don't know about rotors, but I have installed 3 sets of Wagner Thermoquiet pads on 3 vehicles and have been awed everytime. Great performance (always improved) and great low wear.