Immersion 1944 is a - finally - Singleplayer Mod for Company of Heroes 1. It provides tons of historical skins, several new missions and enhanced campaigns that are altered to better mimic the historical engagements, with more correct units, bigger vehicle choice and lots of random stuff that makes every single vehicle or soldier look unique.
The Panzer Lehr Division was a Wehrmacht elite unit, equipped with the best material available and fully mechanized. It fought against the British, until it was transfered to the American sector in mid of July 44.
The Panzer Lehr makes its appearance in the US campaign in Hebrecrevon, partly on Hill 192 and St.Lo. They also fight with you in the 3rd "Tiger Ace " Mission. But NOT in Montebourg, as they still were in the British sector.
Can unlock them in future skirmish?