The long 12-year production (1979–1991) resulted in 818,063 sedans/saloons and 74,060 coupés being built, totalling 892,123. W126 is so far the most successful and the longest in production for S-Class.
The S-Guard, specially modified W126 S-Class models were produced for the transport of dignitaries and world leaders. Among the modifications made included a wheelbase stretch, bulletproof glass, and armoured body panels.
This B6 Class armoured 500 SEL has been ordered by National Security Service of Bulgaria back in 1983 directly from Mercedes-Benz. Their the W126 was armoured by Mercedes Benz. The National Security Service kept the Car until 2019.
The car is in very good condition as it has been maintained with no expense spared by National Security Service. It was used to transport the top government people in Bulgaria. The car has small cosmetical defects like a missing star, flag poles and headlight wipers.