Ok friends, time for some real fun! I'm sorry to be distant for so long, but i've been super duper tied up with work. But.... I need some real advice here!

Can someone tell me if this is caused by a sudden burst from weather? OR.. is this a full blown tire slashing?
There was someone i was dating for some time who after a while i discovered is very bipolar and has a abusive impulse you wouldn't believe, so i broke it off a short while ago. She would do something like this.. But I very much hope this is not the case. I hope it's just an explosion from temperature or something. Pictures are below. Totally flat of course.

I mean since mid october i've had them filled well under what is rated on the tires as being max psi. But it was perhaps a couple PSI above what mercedes had recommended. Like if the tires are 44 max, and mercedes recommended 34 or something, then i would have put them at 36 ish. I remember doing that. Would a decrease in temperature go this wrong?

The pictures are at an angle so you can't really tell this, but the lines are perfectly straight. There are three "cuts"..

Is this not the most interesting thread on the forum now?

Aside from this.. the engine has been starting up perfectly except for the fact that i have to change my main fuel filter since i did a diesel purge and partly plugged it up with cleaned out gunk. So when i start it up i quickly give it a tiny bit of throttle otherwise it stutters. After just 1 second of a little extra gulp of fuel it's totally fine. Never stutters during operation. But in that regard i've been a bit of a neglectful owner. Gotta change that filter. I mean it hasn't come to a stall out from this, just a blip stutter which i haven't let happen since the first couple times.

But the glow plugs are definitely working. In fact better than my other vehicle. On that one i had to wait two or three times as long as the light would stay on, for the glow plugs to be hot enough to start things up. But on this one it just turns right over.

I'm happy with a lot of things overall, but frustrated with the turbo situation. I got so busy with work that i was not able to swap turbos before the weather turned. So now i have to find a place indoors for a couple days. You know, when i have time. But running the heat invites the fumes into cabin. So it's been cold rides. Fortunately my work is only a 10 minute drive.

Here's what i woke up to this morning..