silverstr8p

I want to swap my 2014 GLK250 Bluetec transmission control unit, I think it's called an ISM, with a used part off ebay and then take it to the dealer to have it programmed, will they do it? I have an Autel scanner/programmer, but I don't think the MK808BT will program these.

angryartichoke

That's a question for your dealer. My dealer doesn't do programming on any used parts.

Odd Piggy

My Autel 808 can read transmission codes, so I assumed it could, but I haven’t tried. You have the BT model which, I think, does battery testing. A lot of the extra functions like key programming take an extra module or adapter. Maybe there’s one for this. You could probably look on Autel’s website or contact them to find out.

silverstr8p

If I get a ISM that the seller claims was "flashed", does that mean I can just install it, or do I still need to program it?

I've tried to contact Autel a couple times and got no response. I hooked it up to another make/model and it showed some transmission options, not sure if they're the right ones though.

Odd Piggy

Flashed, I assume, would mean that it can just be installed. But that makes me wonder… The shift controller on the C-Class is on the DAS which would make me think it needs to be married to the ECU. But maybe it’s an end point device and it’s not polled. I have never had to go there, so not certain. Generally W204 and X204 are very similar.

We need someone who has a WIS handy.

I contacted Autel once a few years ago by email and they replied with the solution the next day.

support@auteldiagnostictools.com