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Just replaced the front SAM module in a 2009 C300. The part that was in there was an A 204 545 5501 and I replaced it with the later version A 204 900 9601. I knew that it wasn't just going to be plug and play so here I am, trying to figure out my next step should be based on some solid suggestions that can hopefully be thrown my way, Pease and Thank you.
What is the car doing with that replacement sam installed?
Does the car start, run, warnings popping up on the dash, fault codes showing when scanned with OBD scanner?
I think if you got a sam with the same part # and then looked up each cars vin #'s to make sure they have the same options you have a better chance of it being plug and play.
I just replaced the Front SAM and paid a guy to SCN code it. Most of it works now there is a problem with SRS - Airbag warning light ( says variant coding issue). He was unable to fix it
Other issue is no "power windows" !!!
Remove the battery for 5 minutes and windows should be OK, if not maybe your codings are wrong,
Do you have Xentry?
Hey mate,
thanks for that.
I got someone to code it and I don't think he could do it.
The boot open button opens the driver side window, looks like coding issue to me
Just replaced the front SAM module in a 2009 C300. The part that was in there was an A 204 545 5501 and I replaced it with the later version A 204 900 9601, which is similar to how CNC Machining Services demand precise compatibility and calibration requires proper setup before it will function correctly. I knew that it wasn't just going to be plug and play so here I am trying to figure out my next step should be based on some solid suggestions that can hopefully be thrown my way Pease and Thank you.
The replacement SAM module will not work properly until it is SCN coded and variant programmed to your vehicle’s VIN using Mercedes Xentry/Star Diagnostics. After installation, you need to perform coding/adaptations, clear all fault codes, and verify CAN communication. Without coding, you’ll continue to see electrical issues or non-functional systems even if the module powers on.
No. The car doesn't crank over. Nothing happens when key is turned except that the steering wheel does unlock and lights on the dash come on. Only communication with ESP and SRS modules.
Yeah the plug and play option is ideal. However, by luck I obtained the newer (used) one for free.
I wonder if anybody has any luck with that EEPROM switch over.....🤔 or how can I obtain Xentry, Vediamo or DTS Monaco software?
Last edited by Jenbme48; Apr 24, 2026 at 03:18 PM.
Old eeprom data is related with the old Software that's suitable for old HW. Using old data over the new HW/SW will bring you a bricked SAM.
Any laptop, Vediamo from internet, Openport interface will be the cheapest solution, if the fuses and relays are on the same positions like in the old SAM....
Old eeprom data is related with the old Software that's suitable for old HW. Using old data over the new HW/SW will bring you a bricked SAM.
Any laptop, Vediamo from internet, Openport interface will be the cheapest solution, if the fuses and relays are on the same positions like in the old SAM....
I have the cable that has the OBD adapter on one end and the USB for the laptop on the other. Also, have a laptop that already has WIS/EPC on it and so just need to know how to obtain Vediamo, please somebody. 🙏
I got a guy to help me and his team also helped me from US ( I am in Australia).
I am in a kind of sticky situation here. I bought the part from overseas and its for LEFT HAND DRIVE vehicle where as mine is Right Hand Drive.
Tried SCN coding both online and offline and it still is not 100%.
I cannot get the windows to work.
Anyone had similar experience ?
Thanks,
Rahul
Although you hijacked another thread, and you didn't add any context, till you answer my question from post #4, you may try this procedure ( this has to be done when a newer SAM - the one with 212900...- is installed on an older car).
I went ahead and went the direction of getting another SAM module with same part number as the original. So now I would like to know HOW plug and play is this option? Do I not have to do anything for the SAM to know that it lives in a car with a different VIN or anything? Also, from what I was told the LAUNCH X431 Pro I currently have has a feature where you can do a backup of the coding on the original SAM and the restore that to the new SAM. Anybody know if that works or of anything else I would need for completing this process of a SAM module swap out with same part number?
I went ahead and went the direction of getting another SAM module with same part number as the original. So now I would like to know HOW plug and play is this option? Do I not have to do anything for the SAM to know that it lives in a car with a different VIN or anything? Also, from what I was told the LAUNCH X431 Pro I currently have has a feature where you can do a backup of the coding on the original SAM and the restore that to the new SAM. Anybody know if that works or of anything else I would need for completing this process of a SAM module swap out with same part number?
Several different sources say that SCN coding is required even though the SAM is replaced with same part number because it has a VIN currently stored in it that is different than the one it is being put in causing it to communicate with scanner but disagreeing with the ECM because the VINs don't match. I just need to know how whether this is true or not so I can do what I need to do next.
If you have the same part number, then the coding can be copy/paste with any tools, even with generic Autel/Launch, supposing that none of the SAM's received any SW updates. This can be checked reading the SW version from SAM and CGW ( both are inside of the SAM module)
Generic tools, can't determine the Diag Versions of any Mercedes module as they are based on a generic version of the Software. So, sometimes read and write different or incomplete parts of the coding if those tools missed the correct version.
On the other hand, a 15$ Openport and a specialised old Program like Vediamo 4 free on internet or very cheap, can read the codings ( SCN codings) in human real text and can write with help of the user into any SAM, even if the the reference number or HW / SW differ.
Just replaced the front SAM module in a 2009 C300. The part that was in there was an A 204 545 5501 and I replaced it with the later version A 204 900 9601. I knew that it wasn't just going to be plug and play so I checked the Portal MyBayar Rasmi for any helpful resources and here I am, trying to figure out my next step should be based on some solid suggestions that can hopefully be thrown my way, Please and Thank you.
You need to SCN code and variant code the new SAM module using Xentry so it matches your car’s VIN and equipment. After that, you may also need initialization/teach-in and possibly firmware flashing depending on the software level. Until it’s properly coded, the module won’t function correctly even if it physically fits.
So when the steps of backing up the data from your old SAM gets saved with a particular file name that you then use to restore on to the replacement SAM gets completed what is actually taking place in that process?
If you use Vediamo the saved file it's a .html file with all coding saved in human-readable text. So you can manually code the new SAM.
If you use DTS Monaco, you can save into a special DTS file and you can load directly into the new SAM - but only if the new SAM has the same Software Numbers as the old SAM. Part number or Hardware number it's not important as long as the Software is compatible.
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