Im bummed ,just finished getting this car back together and last night on my drive home I lost all forward gears .The reverse was usfully on getting it on the trailer my neighbor had brought over but it seems its due for a rebuild . Could this be any another problem other than internal?

May be the B2 piston which is a external repair. Plenty of information on this site.

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Present
1987 300SDL
1991 300SL
1990 560SEL
2001 ML320

Past
1969 200D 1979-82
1983 300SD 1984-85
1972 250C 1982-02
1995 S350 2011
1997 S320 2012

How about the obvious? Fluid level - cable adjustment - shifter etc etc

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!

I believe reverse with no forward is the symptom of a B2 failure.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

What a nice backup system (pun) that is...
allowing you to back up onto a trailer in order to go home....
Not all car manufacturers think that far ahead....

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1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/showthread.php?threadid=10414

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/showthread.php?t=156207&highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html

Working reverse is good... means it is not the pump as you have hydraulic pressure.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

This is a simple DIY repair..
The B2 piston has failed/broken.
Phil has this part in stock, tell him whunter sent you..


B2 Piston Failure
http://www.peachparts.com/shopforum/showthread.php?t=85953

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

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

C220 won't go forward. HELP!!! *B2 Piston*
http://www.peachparts.com/shopforum/showthread.php?p=732079

B2 Piston W124
http://www.peachparts.com/shopforum/showthread.php?t=109035



.

__________________
ASE Master Mechanic
asemastermechanic@juno.com

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
1984 190D
2003 Volvo V70
2002 Honda Civic

https://www.boldegoist.com/

Thanks to all, great news that I get to do a DIY project I've never actually completed before.
The night of the breakdown I was almost considering driving it home in reverse, 2 miles from home and coming back at 3 am with no traffic ,then I thought better of it.
The first try up the trailer in reverse I got her stuck on the floor board trying to make it up the ramps.
We had to release the trailer off the truck to raise the trailer up then go running after the car as it exited the trailer rolling down the parking lot, Longer ramps became our savior.
I've brought his car back from the grave due to a front end collision it had 2 yrs ago.
Upon buying it I already had a list of add ons for the car (euro bumpers, euro lights, sec front bumper, and a fresh set of new tires) "Isn't she sweet" came to mind after bolting everything up and waxing and washing the old forgotten lux mobile.
Just a bit more time and she'll be back in driving form .
I'm A #1 fan of the 300SD and cant wait to find another abandoned project waiting in the weeds.