There's a vacum modulator on the side of the transmission that you turn to either soften or stiffen the shifting characteristics.
Do a search function. There is a lot of info in the archives.
But Mr. Bill is right. 1992 is the first year of first gear start. 1991 and older 300E's start out in second gear. The 1 to 2 shift is a little abrupt.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".