LAH against AT - that's not that simple!
I was not there.
How was the weather? How was the terrain? As the troops were well supplied?
How were the values for readiness, unit integrity, morale, entrenchment, and experience?
Many important questions.
LAH against AT - that's just not that simple!
Well, it's simpler than you think.
Unless the LAH was completely out of fuel and ammo, cut off from all resupply and hope of resupply, and had been savaged to the point where it was a mere Kampfgruppe shadow of its former self *and* the Russian AT Brigade was actually equipped with SU-152s or the like, then, really, it would make no difference at all ... 2/3rds of a German mechanised division would go through it like a hot knife through butter.
Towed AT units, and that's what we're talking about, were organised to be used *in conjunction with* infantry units. They simply could *not* stand against mobile forces, except as a speed bump, because they could not defend their flanks and rear in any useful way. They needed to Infantry to cover their retreat and repositioning when they'd gotten off their one or two shots and had been pinpointed and were attracting enough fire to be destroyed, as a general rule.
With infantry backing them up, they could move position ... or be protected enough so they didn't *have* to move position (Tanks by themselves against dug in infantry with good morale, are pretty useless for the most part, too) ... but against a mechanised combined arms unit, SS or not, they're generally dead meat.
So, unless, as I noted, some amazingly stupendously cosmic lucky event happened ... all the German fuel trucks were hit by a meteor shower or something ... the Russians would be doing well to delay for a few hours, maybe half a day if they were realistically lucky ... no more.
Author, Space Opera (FGU); RBB #1 (FASA); Road to Armageddon; Farm, Forge and Steam; Orbis Mundi; Displaced (PGD)