This is very simple. It's WWIII, you're average conventional ground war scenario in the early-to-mid 1980s. We've all been over a million times the American and Soviet military abilities. That's fine.
But let's take our eyes off CENTAG for a moment, and focus on NORTHAG. More importantly, the British Army of the Rhine.
Let's assume for a moment that through a fluke of history and warplans, the East German Army, known as the Nationale Volksarmee, is tasked with breaking the BAOR.
I don't care about realism of the war plans, what we're looking for here is if the East German army had it in it to take on the British Army of the Rhine and win.
The BAOR was not just British. It was 4 Corps strong, consisting of Belgian, Dutch, German and British Corps. These troops guarded the defensively hardest terrain in the whole of Germany, and were expected to take the most casualties.
What, in your opinion, would be the Volksarmee's best option in attacking the combined forces? Could it make a dent and at least capture any of the major cities in West Germany?