I finally built a code scanner per Arthur Dalton's instructions. Unfortunately, the results don't appear to match the problem, so I'm concerned that I'm not doing something correctly.

For example: 94 e320 Wagon with low and fluctuating idle, poor acceleration and an occassional backfire after startup. When I parked the car 3 months ago, it was beginning to have these symptons as well as the bad EGR code. I finally replaced the EGR valve and cleaned out the EGR tube and Water Temperature sensor (per dealer's scanner). In addition, the rotors now sound like they have a high spot (rub sound increases with speed). The rotors, pads and sensors have less than 200 miles since installing them (just before EGR code appeared).

Mr. Dalton's code reader output / CS1000 Fault Code Scanner page
Pin 6 - 2, 3 & 4 / Page 58
Pin 14 - 2, 3, 5 & 14 / Page 28 [Model years 1990-1992]
# Pin 14 [Model years 1992-1995] uses a 38 pin connector and CS1000 codes are different.

Pin 6 codes are for wheel speed sensors
Pin 14 codes are 2 = (fuel pump relay), 3 = TN/TD signal, 5 = Output for air injection pump control defective 14 = Vehicle speed signal illogical.

Does it appear that I'm using the Dalton scanner to CS1000 correctly?
Pin 6 codes - What would cause this and what do I do for the brakes?
Pin 14 codes - Where do I start?
Is there a 38 pin connector for scanner in this car? If so, where is it?

Thanks
Bob

You are reeading wrong charts and connectors.
The car is a 124.032
It has the 16 pin diagnostic box.

Go here for that chassis

http://www.peachparts.com/shopforum/showthread.php?t=107630

Arthur,

Thanks for the reply. I forgot to mention the battery lost its umph during its 3 month nap. I did overnight recharge, but it hasn't come back to its previous start power. It takes about 3 cycles to start. However, non running volts @ 12.38 and running @ 14.12. Could battery's present state be affecting the codes or are other problems affecting the startup?

Ran codes again and referenced mercedesshop doc ...107630
Base code 26 Upshift delay switch
Pin 8 code 8 = Idle speed control
Pin 14 codes 2 = EA/CC/ISC or etc, 3 = Right EA/CC/ISC, 5 = Stop lamp Switch, 14 = Closed throttle position switch

Sounds like Pin 14 is beyond my DIY skills. Your best guess, could it be one or many items needing replacement? Which one(s)?

Does engine temp (hot vs cold) affect code testing?

Other than Base, Pin 8 and 14, are other Pins testable with your device?
Can the CS1000 doc be used as cross reference for some pins?

Thanks
Bob
PS I used a Radio Shack 275-1566a Momentary switch. It has less parts (no seperable base to disconnect) than 275-1556 switch.

Ok

First . the pages you are using are wrong for the CS1000 manual
Your car is HFM/SFI and a 104 engine , with a chassis # of 124.032.
look in those pages.

You are looking at LH chassis from different years and 38 pin is only in V8s on 124 , plus 14 is different for ASR/ No ASR

The correct pages , if you want to use CS1000 are ;
DM page40
HFM pin * -page 31
Ea/cc w/o asr page 47
W/asr page 48.

NO 38 pin Diag box pin on your car, ever....
Pin 6 is SRS , NOT abs

Second
Don;t know what the doc you refer me to?? Got a better link??

Pin 14 can be sticking cable or adjustment
Brake lamp can be temp code
You know 26

Third
Other pins can be used from CS10000 , but they have to say 124.032

On the RS sw. , That one is fine .. just a little bigger .. I use the other as it takes a smaller lount hole , but both are spst- momentary/on..

Charge bat, reset codes to clear , along with memory and retest after a few drive cycles

Arthur,
Thanks for quick reply. I'm starting to see the trees through the forest.

Code reference doc is
http://www.peachparts.com/shopforum/showthread.php?p=742563#post742563
by cdanschwartz dated 11-11-2004

Have a good weekend.
Bob

I still couldn't figure it out, so I took it to the dealer for diagnostic.

$171 for for 6 spark plugs and a burnt spark plug wire. Drove 200 miles, ran fine. On return trip ASR light came on, but never went into 'limp mode." Moved it from one parking place to another and both SRS and ASR lights came on, but went out after a few moments. Does it ever stop? At 131k, I'm really disappointed in MB...

Bob

They did not change the brake lamp switch ???

No. But I'm planning to do it. Hopefully it's all it needs.
Bob
PS Don't you ever sleep?

Yeah..
Mt Staff wakes me as soon as a Post comes in......