Popular Variant Coding Guide.

IMPORTANT SAFETY & LEGAL DISCLAIMER (READ FIRST)

This guide is for educational and off-road/track-use purposes only.
Incorrect coding can cause CAN-bus errors, permanent faults, limp mode, immobilizer lockouts,
or “bricked” modules requiring dealer recovery.

Changes may affect warranty, emissions compliance (US EPA/CARB), DOT/FMVSS lighting
legality, or vehicle safety systems.
US-spec 2014 models have built-in restrictions; aggressive DRL, torque, or lighting tweaks can
throw faults or fail inspections.

Always use a stable 13.5–14.5 V battery charger. Always read & backup the full coding
string/hex before every change. Test one parameter at a time, cycle ignition twice, clear DTCs,
and road-test.
Reversible by restoring your backup + SCN reset.
Professional coding service or Xentry with developer access is strongly recommended if you
are not experienced with Vediamo/DTS Monaco.

You assume all risk.

Table of Contents (make clickable in PDF)
1. Most Popular Tweaks at a Glance
2. Tools, .cbf Files & SCN Notes
3. Front SAM (SAM-F)
4. Rear SAM (SAM-R)
5. Instrument Cluster (IC)
6. ME / Motor Electronics (M276)
7. COMAND / Head Unit (NTG4.5)
8. HVAC / AAC (Climate Control)
9. Transmission (722.9 VGS3-NAG2)
10. ESP / ABS Module
11. Central Gateway (CGW)
12. Electronic Selector Lever Module (EWM / N15/5)
13. SDARS / Satellite Radio
14. Full Appendix & Master Parameter List

Tools, .cbf Files & SCN Notes
Tools: Vediamo or DTS Monaco for offline variant coding; Xentry for full SCN coding butt coding is limited on Xentry offline.

SCN (online Mercedes server sync) is mandatory after any module replacement.
Offline workaround: read old module’s full coding string and write it to the new one + SKGT simulation if needed.
Always: Stable 13.5–14.5 V power, backup every string, one change at a time, ignition cycle 2×, clear DTCs.
ALWAYS! Use Xentry or something similar to go see your can buss and get the correct .CBF or
.Smr-D files to access modules on your car. They are not all the same so get the module name and be sure to use the correct one.







Front SAM (SAM-F) – Most Popular for Lighting & Convenience
Controls headlights, fogs, mirrors, wipers, central locking, etc. Hardware: SAMF_204.cbf (facelift 172 series). SCN required after replacement. US Note: DRL combos restricted by DOT.
Popular Variant Parameters
Parameter (English/German) Default Recommended Change Effect Notes / US Caveat

Spiegelanklappu ng / Spiegelanklappu ng_bei_Verriege lung
inaktiv
aktiv
Mirrors fold/unfold with lock
Works instantly


Spiegelabsenku ng_beim_Rueck waertsfahren
inaktiv
aktiv (if memory seats)
Passenger mirror tilts down on reverse
Memory seats required


Tagfahrlicht / PLSM_TFL_AVL restricted (US) aktiv / Ja Enables/change s DRL
style/intensity Fixes LED errors


Tagfahrlicht_Hell igkeit
5–10%
20–30%
Brighter DRL at night
LED retrofit friendly


Coming_Home_ Funktion / ComingHome_D auer
inaktiv / 0 s
aktiv + 30–120 s
Headlights stay on after locking
Low-light activation


Leaving_Home_ Funktion
inaktiv
aktiv + timer
Lights on when unlocking
Approach lighting


Anzahl_Blinken_ bei_Verriegelun g1
2–5 More flashes on lock
Visual confirmation


Hupen_bei_Verri egelung
inaktiv-aktiv
Horn chirp on lock
Audible feedback


Komfortblinken
1–3
3–5
One-touch = multiple flashes
Turn-signal convenience


Automatische_V erriegelung_ab_ Geschwindigkeit
off
15–20 km/h
Auto door lock above speed
Safety feature


Lichtfunktion_… (bulb type
channels) Halogen LED codes (PWM/resistance) Fixes errors after LED
retrofits Front DRL, fogs, etc.


Exact Process (Vediamo): Stable power + OBD → Load SAMF_204.cbf → Variantenkodierung
→ Read & backup hex → Edit parameter → Write Coding → Ignition off/on, clear DTCs, test.
DTS Monaco: Variant Coding tab + Full coding write.
SCN Equivalent: Xentry or offline full-string write + module reset.
Risks: DRL faults on pre-LED cars; mirror folding may need door-module sync.

Visual Resources (pause for perfect screenshots):
YouTube: Mercedes W212 W204 Retrofit Folding Mirrors Coding (timestamp 8:38 for Spiegelanklappung) → YouTube: Mercedes C Class W204 Folding Wing Mirrors Activation →





Rear SAM (SAM-R) – Rear Lighting & Trunk Functions
Handles rear lights, trunk release, fuel pump relay, etc. Hardware: SAMR_204.cbf. SCN mandatory after replacement (water damage common). US limitations: Some lighting tweaks restricted by DOT, but LED retrofits work well.
Popular Variant Parameters
Parameter (English/German) Default Recommended Change Effect Notes

Rückleuchten_m it_Tagfahrlicht
inaktiv aktiv / Ja
Rear parking lights on with front DRLs
#1 most-requested Euro look

Lichtfunktion group (Brake,
Halogen
LED / specific PWM codes
Eliminates hyperflash & errors after LED taillights
(Do bulb types FIRST
Reverse, Position, Fog)


Nebelschlussleu chte_beide_Seit en one side beide / aktiv Both rear fog lamps If retrofitted

Innenraumbeleu chtung_Nachlau fzeit / Trunk light
factory
Extend duration
Longer trunk/interior light timeout
Convenience

Kofferraumöffnu ng
standard
Double-press / foot-sensor logic
Tweaks for key-fob or retrofit sensors
Hardware required

Exact Process: Same as Front SAM.
SCN & Risks: LED coding critical — improper bulb types cause persistent “Rear lamp” DTCs.

Visual Resources:
YouTube: Mercedes Rear SAM programming example → YouTube: W204 LED tail light install & coding →





Instrument Cluster (IC) – Displays & Warnings
Popular for chimes, displays, and sport features.

Popular Variant Parameters
Parameter Default Recommended Effect

Gurtwarner / Seatbelt chime
aktiv
inaktiv
Disables acoustic warning

Einheit Geschwindigkeit mph km/h Speedometer units

AMG Menu / Sportanzeige off aktiv
Lap timer + sport modes

ECO mode indicator
visible
hidden
Hides start/stop reminders

Service interval / ASSYST
factory
custom
Oil change reminders

Startup logo
Mercedes
AMG
Custom startup screen

Process: Variantenkodierung in IC module.
Risks: Minimal; reversible.

Visual Resources: Search “W204 Instrument Cluster Gurtwarner disable coding” on YouTube.






ME / Motor Electronics (M276 3.5L V6)
Throttle & engine behavior. Hardware: MED177_xxx.cbf. SCN mandatory after replacement. M276 Nuance: Many parameters already optimized from factory — gains subtle.
Popular Variant Parameters

Parameter Default Recommended Effect M276 Note

Lastschlagdämp fung / Load
often already inaktiv inaktiv / 0
Removes artificial throttle lag
Biggest felt improvement Reversal Damping


Pedalkennlinie (KLDx) KLD4 (standard) KLD2 or KLD3
Alters gas pedal mapping KLD2 =smoother

Momentenbegre nzung
aktiv inaktiv
Reduces torque cut during corners
Minor acceleration gain

Start-Stop Strategy
aktiv inaktiv
Permanent ECO start/stop disable
Ignition cycle needed

Process: Unlock ECU → Read backup → VCD_Implizite_Variantenkodierung → Write → Relearn throttle (20–30 min drive).
Risks: Rough idle, limp mode, or emissions faults if not relearned.

Visual Resources: MBWorld thread with M276 throttle coding findings → https://mbworld.org/forums/c-class-w...s-throttle-del ay.html






COMAND / Head Unit (NTG4.5)
Infotainment. Hardware: HU_204.cbf. SCN required after replacement.

Popular Variant Parameters
Parameter Default Recommended Effect

TV/Video Geschwindigkeitsbeg renzung
Dis > 5 km/h
Enable(0)
Video in Motion (DVD/nav while driving)

Engineering Mode / Entwicklermodus inaktiv aktiv Unlocks hidden developer menu

CD Ripping Mode
standard
Ripping
Rip audio CDs to HDD

Show Speed Limit Signs
off activated
Displays from nav maps

Process: Variantenkodierung → Write → Ignition cycle.
Risks: MOST bus death if fiber not seated; anti-theft lock after replacement.

Visual Resources:
YouTube: How to unlock video in motion for Mercedes W204 C63 NTG4.5 → YouTube: How to unlock video in motion for Mercedes NTG4.5 NTG4.7 →





HVAC / AAC (Climate Control)
Hardware: AAC_204.cbf.

Popular Variant Parameters
Parameter Default Recommended Effect

TEMPOFFSET
0–2 / –3
Colder A/C (ice-cold air)

ManuMLNoLimit
nein ja
Manual recirculation stays on forever

Restfunktion
aktiv tweak duration Residual heat longer


Process: Search TEMPOFFSET → Write → Run flap basic settings.
Risks: Evaporator icing if too negative.

Visual Resources: YouTube: How to Change the Climate Control Mode to Mercedes W212, W204 →





Transmission (722.9 VGS3-NAG2)
Hardware: VGSNAG2.cbf. SCN mandatory after replacement.

Popular Variant Parameters

Parameter Default Recommended Effect
Byte E6 (manual hex) E6-F6
Agility (A) + Manual
(M) modes


Process: Manual coding section → E6 → F6 → Adaptations reset → Road test.
Risks: Limp mode after conductor-plate swap if SCN skipped.

Visual Resources: YouTube: How to activate Agility Mode on 722.9 VGSNAG2 →





ESP / ABS Module

Safety-critical. Main uses: post-replacement commissioning.
Popular Operations
Operation Default Recommended Effect

VIN coding after swap
mismatch
write old VIN
Clears VIN mismatch faults

Lenkungswinkel Nullpunkt
needs reset
reset
Steering angle calibration

Gierrate Nullpunkt
needs teach-in
teach-in
Yaw rate zero point

Anfahrhilfe (Hill Start Assist)
aktiv
inaktiv (rare)
Disables auto-hold on inclines

ESP Off menu (coded in IC)
off
vorhanden
Shows ESP OFF in steering menu

Process: Variant Coding tab + adaptations/teach-in.
Risks: Safety critical — never fully disable on public roads.

Visual Resources: YouTube: W204 ESP SCN coding after replacement.






Central Gateway (CGW)
Often integrated into Front SAM. Main use: SA-code activation for retrofits.

Popular Parameters
Parameter Default Recommended Effect

SA-Code activation factory add 500, 536, 890 Unlocks mirrors, SiriusXM, power trunk

VIN coding
mismatch
write old VIN
Clears no-start / no-comm faults

Drive Authorization
Protected
No protection
Allows engine start post-coding


Process: Edit Ausstattungscodes → Write → Recode dependent modules.
Risks: Immobilizer brick if string wrong.
Visual Resources: YouTube: W204 CGW SA code coding.






Electronic Selector Lever Module (EWM / N15/5)
Main use: drive-authorization sync after replacement.

Popular Operations
Operation Default Recommended Effect

Drive Authorization
Denied
Transfer old string
Clears P1925 / no-start faults

Range sensor teach-in
needs learn
perform teach-in
Fixes shifter position errors


Process: Full string write + range teach-in.
Risks: No start / stuck in Park if auth coding fails.

Visual Resources: YouTube: W204 EWM SCN coding.






SDARS / Satellite Radio Main use: activation for retrofits. Popular Parameters

Parameter Default Recommended Effect
Satellitenradio
inaktiv
aktiv
Enables SiriusXM in COMAND menu


Process: Set to aktiv + MOST ring test.
Risks: MOST bus death if fiber not correct.

Visual Resources: YouTube: W204 SDARS SCN coding.







Full Appendix & Master Parameter List
Common SA Codes
500 = Power-folding mirrors 536 = SiriusXM
890 = Power trunk lid 219 = Distronic
Troubleshooting Quick Matrix
Rear lamp DTC → Rear SAM LED coding No communication → SCN / string transfer ESP inoperative → yaw/steering calibration
MOST faults → check fiber + SDARS/COMAND



Alphabetical Master Parameter List (full list from all modules) Anzahl_Blinken_bei_Verriegelung, Automatische_Verriegelung_ab_Geschwindigkeit, Byte E6, Coming_Home_Funktion, Gurtwarner, Hupen_bei_Verriegelung, Komfortblinken, Lastschlagdämpfung, Lichtfunktion group, ManuMLNoLimit, Nebelschlussleuchte_beide_Seiten, Pedalkennlinie, Rückleuchten_mit_Tagfahrlicht, Spiegelanklappung, Tagfahrlicht, TEMPOFFSET, TV/Video Geschwindigkeitsbegrenzung … (all 80+ parameters from your original docs)

Any incorrect info or format problems with the way the text was added to thepost message me and ill fix it.

 

PDF download

 

@RobertR728 Thanks for the info. A lot, but not all, of the tweaks can be done in the dash menu or with the LAUNCH Creader Elite BENZ scanner. I printed out your pdf and am going to try and see if a few of the items are available using LAUNCH.

 

Yes unfortunately the launch scanner will not do everything. It will let you change some low level options but the options can be changed with DTS Monico or Vediamo PC softwares. Also all options are not available on all cars.