Some prefer to run the trans in 3rd for warm-up and BB the shift delay...me included
Do you mean to put the shift knob in 3rd and drive until the car has warmed up?
And what does 'BB' mean? Sorry for not knowing the shorthand.
I thought in my car (93 W124, M104) the upshift delay valve delayed the shift from 1st to 2nd, so I wonder how putting the transmission in 3rd affects this.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".