...but there is no information that a SAS for the Merkur ever existed, that went beyond mass simulators for drop tests.
No offense, but if you don't know something it doesn't really mean that this is not exist.
Scruce
TKS had a LES that you already deleted It was intended to save vessel in case of abort on launch pad and in the max Q part of trajectory. Unfortunately i cant remember timings of LES jettison. TDU engine is very small, it had a power to provide deorbit burn and abourt in later stages of flight.
Here is few pics for you: