Hi Bavilo, I also had those issues and what I ended up doing was buying the silicone socks from e3d and did the PID tuning with the sock on. After that it came out perfect 
It has to do with the temperature deviation being to big… Here is a link to a video explaining how you can do it: E3D Silicone Sock on Original Prusa i3 MK2 + PID Tuning - YouTube 27
Try is with the silver prusa filament and like wirlybird said, play with the temperature. Printing speed for a marlin should be around 20-30 mm/s 
Do you print at normal speed? Try use another slice. In use cura with my prusa mk2
In my case i have live-adjusted the Z-axis (you can set this in the settings menu) to -0.300. That was a result of the test prints of calibrating the first Layer. It is well documented in the manual: http://www.prusa3d.com/downloads/manual/prusa3d\_manual\_mk2\_en.pdf
Chapter: 6.3.9.
After fine-tuning this “live z-axis” i got much better prints and the first layer is perfect.
Probably this helps for you, too?
Greetings,
;-liver
Hello, what speed did you use ? Have you try with Cura ? I have the same printer as you, in kit, and i had some issue with slicer, this is why i use Cura and the result are compliant with my expectations now. Z adjust is also -0.300 to get a good first layer. Let us know ! For economy silver PLA from Colorfabb (2.2kg) i put 213° for hot end and 60° for bed. ED
The live z adjust is dependant on each individual persons printer and the height of their PINDA probe, which is manually adjusted
Exactly!
I don’t know how many I have seen with damaged beds because someone said “set you live Z at xxx” or “you live Z needs to be at” and then they crash the nozzle into the bed.
Correct,
My PLA live z-adjust is at -0.615 mm. Which makes the first layer look perfectly fine.
I have done another print yesterday, I will upload the result in a few hours. I have reset all my changes in the printer profile and used the default setup. On top of that I have tensioned the belts a little more (Not sure if this had any effect). But the print came out much much better.
Pictures will follow soon as I probably need to tweak it some more!
He looks pretty good.
I would work on a .2 version and get that nailed first before fighting with .1!
Remember temps are going to be one of the big issues on Marvin so printing 2-4 at a time can help. Temp on yours doesn’t seem bad though. Speed may be a factor. I printed at about 20mm/sec but then heat can become a factor more.
I think the settings are close so small changes and one at a time to see the effects of the change.
Some of the problem areas are good on yours like the key chain ring.
How’s your first layer?
I did not read through all the replies, but I am having the greatest success using the Prusa’s Slic3r version.
I used the recommend settings for the most part. For Marvin, just select detailed.
Also, on Printer: Settings → Mode – > High Power
Settings → SD Card → Normal