E-Class (W212) 2010 - 2016: E 350, E 550
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Interesting option codes

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Old Jan 23, 2026 | 03:49 PM
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19 GLA45, 86 560SL, former: 14 E550 4Matic, 09 E350 4Matic, 83 240D manual, 78 450SLC, 81 500SLC
Interesting option codes

I was checking out a 2014 E550 for sale with VIN: WDD2120911A925414

A few mystery codes jumped out to me:
  • 003 MANUAL DATE-CONTROLLED VEHICLE
  • N03 DISCHARGE AFTER TOP COAT
  • N05 DISCHARGE BODYSHELL Z1
  • N13 DISCHARGE BODY ONTO KTL DISCHARGE BELT
  • N14 DISCHARGE BODY AFTER KTL BEFORE SEAM SEALANT APP.
  • N29 EXCHG. NOT ALLOWED,BODY/ORDER AS OF BODYSH.W/O PA1
  • N34 INTRODUCE SPECIAL FRONT END RB
Does anyone have any clues as to what these could mean?

I wonder if N03 through N14 mean this particular car got inspected at extra intervals during the body finishing process as a process control...

But I have no guesses about the manual date control, exchange not allowed, and special front end codes.
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Old Jan 23, 2026 | 06:14 PM
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2013 E350
Maybe related to the AMG features?
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Old Jan 24, 2026 | 02:01 AM
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interesting. you've been helpful to me in the past. I'll try to return the favor.....
not called an E500.
076 after the previous code....?? why two codes? maybe transition unit.
003 means part of a specific production, testing, or development sequence.
many of the other early codes are related to specific body preparations (e.g. pre-paint, paint, etc.) and movement within the factory. Why on build sheet? Maybe the body prep is custom or checking on Quality Control.
N34 is a special or modified front end assembly. exactly, idk.
N37 indicated that some assembly, after the body prep, occurred in a specific factory location. for special parts, inspections, quality testing? all possible.
mine has many of the same 'normal' build codes for features and options.
maybe check EPC to see if there are interesting front end parts. GLWSearch

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Old Jan 26, 2026 | 10:05 AM
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19 GLA45, 86 560SL, former: 14 E550 4Matic, 09 E350 4Matic, 83 240D manual, 78 450SLC, 81 500SLC
Originally Posted by Dave Doolittle
Maybe related to the AMG features?
My E550 (and all other North American E550s?) had the AMG featues and didn't have those codes...
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Old Jan 26, 2026 | 10:10 AM
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19 GLA45, 86 560SL, former: 14 E550 4Matic, 09 E350 4Matic, 83 240D manual, 78 450SLC, 81 500SLC
Originally Posted by ColonelKlink
interesting. you've been helpful to me in the past. I'll try to return the favor.....
not called an E500.
076 after the previous code....?? why two codes? maybe transition unit.
003 means part of a specific production, testing, or development sequence.
many of the other early codes are related to specific body preparations (e.g. pre-paint, paint, etc.) and movement within the factory. Why on build sheet? Maybe the body prep is custom or checking on Quality Control.
N34 is a special or modified front end assembly. exactly, idk.
N37 indicated that some assembly, after the body prep, occurred in a specific factory location. for special parts, inspections, quality testing? all possible.
mine has many of the same 'normal' build codes for features and options.
maybe check EPC to see if there are interesting front end parts. GLWSearch
Thanks. Yeah, checking the EPC could turn something up.

You're right, they're usually called an E500...

How much would I give for Mercedes' internal option code database...
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