Yep, there is an upshift delay valve which delays the shift from 2nd to 3rd, keeping the car at a higher rpm. Lets the catalytic converter to warm up faster to reduce smog emissions.

__________________
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".