http://userweb.windwireless.net/~jimc/vdocc1/vdocc1.txt

http://gdl-online.com/testproc.html
http://gdl-online.com/test021.html
http://gdl-online.com/test023.html
http://gdl-online.com/test024.html

The above links will give you all that you have been looking for to checkout, troubleshoot & repair all 14 pin MB/VDO Cruise Control Systems.
This includes the Amplifier, Actuator, Control Switch & Speed Sensor.

If you want the schematics...I will send you the pdf two page file. Email me .... sidoog@aol.com
Page two schematic shows a simple Speed Simulator to build with less than $20 of Radio Shack parts.
The I.C. chip for the simulator is Radio Shack #276-1718@$1.69 (This is an 8 pin 555 timer I.C.)
The 8 pin chip socket is #276-1995, $.69
The board to mount the socket...276-159,$2.4992-pack)
The pot is #271-002 (500k ohms),$3.99, instead if 150k but will work ok if you don't have a source for a 150 k ohm potentiometer.
33 ohm 1/2 watt resistor,$.99(5-pack)
10 ohm 1/2 watt resistor,$.9995-pack)
.1 capacitor, $1.49(2-pack)

I repaired a Cruise Control for a 1983 300SD with the above info. (all transistors & I.C's worked after a full circuit board re-solder)
I also bought a pack of alligator clip test leads & some momentary contact switches to connect to a 12vdc supply.This allowed all parts to be set-up on my workbench,operate & check out.
TIP...Before resoldering ALL points on the amplifier board I used some JASCO LIQUID PAIN/VARNISH REMOVER (Available at Ace Hardware)to brush onto the amplifier circuit board bottom. This removed the clear coating & gave me clean access to re-solder.

I'm super excited to get my hands on the schematics, but the figures don't seem to appear on the page, only text. Any ideas? Thanks!!

__________________
'79 300D, Ivory "Gunther" ......going
'81 300SD, Metallic Blue Silver, The Grey Ghost.....going
'87 300D Turbo ...gone
'05 CDI.... gone

looks like you need to send him an email

__________________
1985 300D cali 190K

http://mercedes.thatchermathias.com/mw300d.jpg

My enthusiasm got the better of me, and I didn't read carefully enough..lol

email sent..

__________________
'79 300D, Ivory "Gunther" ......going
'81 300SD, Metallic Blue Silver, The Grey Ghost.....going
'87 300D Turbo ...gone
'05 CDI.... gone

Mathew...if you want the schematics send me an email & I will send them back in a pdf file attachment.
sidoog@aol.com

SIDoog,
I received the PDF you sent but it will not open. It keeps saying it is a link. Can you zip up the file and the resend it to me please.

__________________
1983 Mercedes 300CD Turbo- 199,370 miles - Lapis Blau
1974 Mercedes 240D - 186,445 miles - Aqua Blau
1982 Volvo 244GL Diesel wagon - 168,956 miles - to be sold
1994 Chevy G30 6.5 Diesel "short bus" converted for camping, painted red white & blue & white stars 78,956 miles
JD F935 diesel front mower

It looks like the schematics are available here- http://forums.pelicanparts.com/showthread.php?t=394659

__________________
'82 300D - Light Ivory, 2nd Owner (Back in the wind April 2013!)

'95 E300D - White, grey interior. (Suffering from stuck/broken glow plugs)

Deuteronomy 22:4-
"Thou shalt not see thy brother's ass or his ox fall down by the way, and hide thyself from them: thou shalt surely help him to lift them up again."

I did not post the schematics because the 2 schematic pages are in a pdf file that I can send attached to an Email.
I could not figure out how to attach a pdf file within this forum.

Sorry, I didn't know they were Porsche or that they were different than the MB version.

__________________
Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)

They are VERY similar if not the same as the 10-pin from earlier Mercedes models. Unfortunately, it is a good bit different from the 14-pin ones we use.

In the end of my current testing cycle, I got about 6 different amps from other members and all but 1 worked fine after stripping the lacquer and doing some re-soldering. The last just wouldn't accelerate. The funny thing is that I CAN'T seem to get mine working again. HAHA go figure.

__________________
My Primary Driver - '85 300CD - 4-speed conversion, 2.47 rear, lowered, euro headlights, rebuilding (not restoring so much)

Wife's - '08 Saab Sportcombi Aero

Riding a '03 Yamaha Warrior