Correct, but the current SDS has all the functionality of the older HHT built in - two different scan tools are not required.

AFAIK none of them will. I do have an MT-2500 with the latest 2003 software but I haven't used it on a LH hot-wire system era car. My cousin has and I just called him to see if he recalls what sort of error codes the Snap-on scanner reported - he wasn't home. I'll email him a link to this thread and see if he remembers how the scanner reported codes.

Tim

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98 Dodge-Cummins pickup (137K)
13 GLK250 (157k)
06 E320CDI (341K)
16 C300 (89K)
82 300GD Gelaendewagen (54K)

I used the Snap-On 2500 to try and diagnose a run rich problem on a 93 400E.

It's been a few years, and I can still clearly recall what it did NOT observe.

Ultimate problem turned out to be a failed fuel pressure regulator. IIRC, pressure was supposed to be around 52 lbs, with a vacuum port that would allow some float to the cut off pressure. Actual measured pressure was off scale at 110 lbs. The scanner had no parameter that would clue you into this information.

The scanner looked at the O2 sensor duty cycle, fuel trim, checked ignition for each cylinder, rpm, and gave some data on the ETA, such as % open. there were several other items, cannot recall anymore.

Initially, we were suspicious of the ETA, but the scanner returned nothing that would conclusively prove or disprove if that were the cause.

Jim

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14 E250 BlueTEC black. 45k miles
95 E320 Cabriolet Emerald green 66k miles
94 E320 Cabriolet Emerald green 152k miles
85 300TD 4 spd man, euro bumpers and lights, 15" Pentas dark blue 274k miles

Dave was interested in the format of the error codes that were reported by the MT-2500. Did the scanner report fault code numbers? If so were they two digit codes or three digit codes? Were there any descriptions supplied for the codes read?

__________________
98 Dodge-Cummins pickup (137K)
13 GLK250 (157k)
06 E320CDI (341K)
16 C300 (89K)
82 300GD Gelaendewagen (54K)

It did report fault code numbers as I recall. I think they were 3 digit, and they did follow up with an explanation.

Again, it has been several years since I used your unit, and my memory is a bit foggy on this.

I had lots of notes (including the numbers and explanations) while trying to diagnose the issues with the 400E, but I'm sure I tossed those after I sold the car.

I know if you plug it into cousin Susie's 95 E320 wagon, you'll be sure to find at least a dozen set codes.

Jim

__________________
14 E250 BlueTEC black. 45k miles
95 E320 Cabriolet Emerald green 66k miles
94 E320 Cabriolet Emerald green 152k miles
85 300TD 4 spd man, euro bumpers and lights, 15" Pentas dark blue 274k miles

Hanno has a new 95 E320 that has a check engine light on, I'm busy tonight but maybe I'll give him a call and see if I could drive up to his place tomorrow night and see if I get two or three digit error codes.

__________________
98 Dodge-Cummins pickup (137K)
13 GLK250 (157k)
06 E320CDI (341K)
16 C300 (89K)
82 300GD Gelaendewagen (54K)

Hey guys, thanks so much for the assistance... much appreciated!

Dave,

I spoke with Hanno and he is really busy until next week, I'll get up there on Monday or Tuesday next week but you won't have your answer (at least from me!) until then.

Sorry - Tim.

__________________
98 Dodge-Cummins pickup (137K)
13 GLK250 (157k)
06 E320CDI (341K)
16 C300 (89K)
82 300GD Gelaendewagen (54K)