I came across this piece of information in an ULTRA signal sent on 23 July 1944 referring to a "reminder" to 1 SS Panzer Corps in particular to return "tankless crews" to enable delivery of replacement tanks and thought it might be of interest (Source: DEFE3/60 – 22 – 23 July 1944):
Has anyone seen anything similar in German documents from this period or have any information about MOERCHINGEN? SS Tank Depot?
CX/MSS/R248(C)84 XL 3203
(XL 3202 SH 47 SHA 2 AG 38 FU 84 EF 42 ST 85 DL 89 TA 97
1 SS Panzer Corps again reminded on 8th July by SS Ops Headquarters of absolute necessity of sending tankless crews immediately to MOERCHINGEN as otherwise replacement tanks and assault guns could not be brought up. 2 SS Panzer Corps, 2, 9 and 10 SS Panzer Divisions, 17 SS Panzer Grenadier Divisions and C-in-C West also informed.
Edited to add: Moerchingen = Morhange SE of Metz.
It would also be interesting to understand if these tank crews were held together with tanks in "long-term" repair at regimental or divisional workshops or further forward with their panzer regiments as a pool of replacements.