Software Updates
Thread Starter
Newbie
Joined: Dec 2017
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2009 MB GL320 BlueTec
Software Updates
I brought a 2009 GL320 BlueTec from a local MB dealer a year ago. Done few small fixes on my own since, expensive parts but nothing major. Since the last full tank of DefBlue, maybe 2000 miles ago, I'm now getting a CEL with code P203D ("the AdBlue fill level sensor has a short circuit to positive"). I can clear it, but it will just come back about a restart or two. I have been reading alot about this code. I saw a lot of reference to software update. How can I think if my vehicle need the software update, beside just taking it to the dealer? Is there a way to find out what "version" is in my SUV, what version is available, and is that something that can DIY?
Thanks.
Thanks.
MBWorld Fanatic!
Joined: Dec 2004
Posts: 4,268
Likes: 253
Take truck to dealer. 30 minutes to check for updates and update scr module if needed. About $75. There is an update that addresses a false positive p203d as well as other scr- related false- positives. If error comes back you need to replace heater element/ level sensor assembly. About $1800- 2000 done at the dealer. Good luck
