From what I understand, the gasser 126's start in 2nd gear and this is why they are little slow off the line. A few questions? Why did Mercedes do this? If it starts in 2nd then does it ever go into 1st? Is there a way to change this? Is there a reason not too?
It may have been emissions related (similar to why the Corvette skips 2 & 3, or used to), or it may have been difficult to get smooth-enough shifting for easy boulevard cruising. Anyway, it should start in 1 if you really mash it, or put it in L first. Our 560 SL's do. -- Jim