Question
What's SDL technology?
Answer
The W126 was the Mercedes-Benz S-Class produced between 1979 and 1991. The different models produced achieved combined sales of more than 800,000 units, making the W126 the most popular Mercedes-Benz S-Class to date. Available as a long- (SEL, SDL) and short wheel base (SE, SD) sedan, as well as a coupé (SEC).
— Source: Wikipedia (www.wikipedia.org)