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When the DAS / RF Module, (or a Key) is supplied it has to come from the Regional Parts Distribution Centre (PDC), usually only one per country, UK is Milton Keynes, because they are the only ones who have access to VIN specific data regarding TRP's and they also have the equipment to program a DAS / RF or Keys, the Dealerships do not.
Dealerships are the only ones who can order and fit these new "Theft Relevant" (Immobiliser) Parts, so that on R170 also includes the Motor ECU
If for example you need to buy a new Key they will require ID and proof of ownership.
New Motor ECU's have to be matched to existing TRP's by doing an Initial Start procedure, which is done with SDS.
Now, all that above relates to buying NEW parts from MB. There are many of us who can Virgin and / or Clone good used parts, but this is a very specialist area, not a DIY.
The DIY method is as Rick said, buy a complete already matched set of working parts from a breaker car THE SAME CAR, EXACT SAME CAR ....................
Downsides are Car now reports the wrong VIN on any diagnostic machine, and if that car came from a different terriitory there may be issues such as Engine Faults due to Version Codings, some if not all states in USA check VIN when doing Annual Testing, and also you won't be able to buy a new / spare key for that vehicle from a main dealership because you can't prove your ownership of that wrong VIN !!
Dealerships are the only ones who can order and fit these new "Theft Relevant" (Immobiliser) Parts, so that on R170 also includes the Motor ECU
If for example you need to buy a new Key they will require ID and proof of ownership.
New Motor ECU's have to be matched to existing TRP's by doing an Initial Start procedure, which is done with SDS.
Now, all that above relates to buying NEW parts from MB. There are many of us who can Virgin and / or Clone good used parts, but this is a very specialist area, not a DIY.
The DIY method is as Rick said, buy a complete already matched set of working parts from a breaker car THE SAME CAR, EXACT SAME CAR ....................
Downsides are Car now reports the wrong VIN on any diagnostic machine, and if that car came from a different terriitory there may be issues such as Engine Faults due to Version Codings, some if not all states in USA check VIN when doing Annual Testing, and also you won't be able to buy a new / spare key for that vehicle from a main dealership because you can't prove your ownership of that wrong VIN !!
It would work, if Drive Auth actually is your issue, (which it looks likely), no need to mess around changing Steering Lock or Transponder Ring either, simply swap your existing Key Blade into the "new" one
But if it turns out you wasted that $400 without proper Diagnosis, you just wasted half or more the cost of a Clone SDS system !!
This is why so many of us advise folks that SDS pays for itself multiple times over .............
I know a guy who has 4 or 5 MB's and he will tell you that his clone SDS has saved him circa $20,000 over 3-4 years due to not playing Parts Darts !!
But if it turns out you wasted that $400 without proper Diagnosis, you just wasted half or more the cost of a Clone SDS system !!
This is why so many of us advise folks that SDS pays for itself multiple times over .............
I know a guy who has 4 or 5 MB's and he will tell you that his clone SDS has saved him circa $20,000 over 3-4 years due to not playing Parts Darts !!
That's why I said to use the original Cars Key Blade, but yeah, I agree with all the rest
Proper diagnosis using SDS by an experienced operator is the cheapest way to properly diagnose these Cars.
Now, if you had SDS, you don't need that experience, as long as you can put screenshots on this Forum guys can look, perhaps guide you through more steps with SDS and give you the correct conclusion .....................
You can't say that that will happen by going to a main dealership or other any other workshop, unless you have experienced the quality of their work on older MB's and accuracy of pin-pointing their faults first hand
Now, if you had SDS, you don't need that experience, as long as you can put screenshots on this Forum guys can look, perhaps guide you through more steps with SDS and give you the correct conclusion .....................
You can't say that that will happen by going to a main dealership or other any other workshop, unless you have experienced the quality of their work on older MB's and accuracy of pin-pointing their faults first hand
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