Mercedes Benz repair: Tranny, vacuum modulator, vacuum control

Question
My 1985 mercedes 500sel is doing the same thing that yours is doing. I believe it is the b2 piston but i would like to have the tranny specs. before performing the operation. Please help  

Answer
Here is the best I can do to assist you.
The B2 piston R&R is a very simple operation.

Transmission modulator adjustment
http://www.mercedesshop.com/shopforum/showthread.php3?p=791654#post791654  

'80 300D transmission adjustment          "Vacuum modulator location"
http://www.mercedesshop.com/shopforum/showthread.php3?t=141111

transmission slipping need expert advice please
http://www.mercedesshop.com/shopforum/showthread.php3?p=566361#post566361

Vacuum Control Valve
http://www.mercedesshop.com/shopforum/showthread.php3?p=869411#post869411

Bad Vac Control Valve?
http://www.mercedesshop.com/shopforum/showthread.php3?p=834716#post834716

whining noise from rear that increases with vehicle speed, not RPM
http://www.mercedesshop.com/shopforum/showthread.php3?p=1050258#post1050258

Rear diff fluid ?
http://www.mercedesshop.com/shopforum/showthread.php3?t=140697

K1 Spring Kit
http://www.mercedesshop.com/shopforum/showthread.php3?t=137381

another K1 thread
http://www.mercedesshop.com/shopforum/showthread.php3?t=140495

B2 Piston Failure
http://www.mercedesshop.com/shopforum/showthread.php3?p=1048115#post1048115

722.118 transmission B2 servo/piston         *B2 Piston*
http://www.mercedesshop.com/shopforum/showthread.php3?t=131124

I Am Really Hurt Now        *B2 Piston*
http://www.mercedesshop.com/shopforum/showthread.php3?t=106317

C220 won't go forward. HELP!         *B2 Piston*
http://www.mercedesshop.com/shopforum/showthread.php3?p=732079#post732079

B2 Piston W124
http://www.mercedesshop.com/shopforum/showthread.php3?t=109035

car won't reverse! HELP!                *B3 piston*
http://www.mercedesshop.com/shopforum/showthread.php3?p=963365#post963365

Bad Flex Disc
http://www.mercedesshop.com/shopforum/showthread.php3?p=868329#post868329

92 300D 2.5 flex discs,diff. mounts and damper
http://mercedesshop.com/shopforum/showthread.php3?p=506832#post506832

Two threads the same title, but different authors and content.
Bowden Cable
http://www.mercedesshop.com/shopforum/showthread.php3?t=54776
http://www.mercedesshop.com/shopforum/showthread.php3?t=41603