So CY should be changed to CN ?

(There are 4 "2010 e-County" with [CS] code. Is it correct? Or should I change that to [CN] ?)

should I change that to [CN]

(2 are [CY], but it is the code of the Aero City?)

Yes This is Hyundai Aero City Model Codes

Hyundai Aero City [CY] Model Code View
https://www.imcdb.org/search.php?resultsStyle=asList&sortBy=0&make=Hyundai&model=- Aero+City&modelMatch=1&modelInclModel=on

Wiki
https://namu.wiki/w/%ED%98%84%EB%8C%80%20%EC%8A%88%ED%8D%BC%20%EC%97%90%EC%96%B4- %EB%A1%9C%EC%8B%9C%ED%8B%B0#s-1

Replied on that vehicle page, indeed it would make sense to put the number in the model name if they are badged and registered as such.

https://www.imcdb.org/vehicle_2095451-Land-Rover-Discovery-L319-2005.html

I think we should change the Land Rover Discovery Mk. III name to "Discovery 3" and "Discovery 4" for the Mk. IV (both with the L319 chassis code). Not sure whether leaving the Mk number or not though as we're not doing it with the Freelander 2: https://www.imcdb.org/vehicles.php?make=Land-Rover&model=Freelander+2&modelMatch=1&modelInclModel=on

Updated
There are 4 "2010 e-County" with [CS] code. Is it correct? Or should I change that to [CN] ?
https://www.imcdb.org/vehicle_2064193-Hyundai-e-County-CS-2010.html
https://www.imcdb.org/vehicle_2089214-Hyundai-e-County-CS-2010.html
https://www.imcdb.org/vehicle_1944290-Hyundai-e-County-CS-2010.html
https://www.imcdb.org/vehicle_1921886-Hyundai-e-County-CS-2010.html

2 are [CY], but it is the code of the Aero City?
https://www.imcdb.org/vehicle_1183343-Hyundai-County-CY-2016.html
https://www.imcdb.org/vehicle_1315585-Hyundai-County-CY.html

And maybe a few others to clean/update in the rest of the County
https://www.imcdb.org/search.php?resultsStyle=asList&sortBy=0&make=Hyundai&model=- County

For All Model Code [CS] (1998~2004 HyundaI County) added Please
View:
https://www.imcdb.org/vehicles.php?make=Hyundai&model=County&page=2
https://www.imcdb.org/vehicles.php?make=Hyundai&model=County&page=3

List:
https://www.imcdb.org/search.php?resultsStyle=asList&sortBy=0&make=Hyundai&model=- County

Wiki:
https://ko.wikipedia.org/wiki/%ED%98%84%EB%8C%80_%EC%B9%B4%EC%9A%B4%ED%8B%B0#%EC%- B9%B4%EC%9A%B4%ED%8B%B0_(CS,_1998%EB%85EC%9B%94~2004%EB%85EC%9B%94)

For All Model Code [CN] (2008~2012 HyundaI e-County) added Please and "e-County" Name Change Please
View:
https://www.imcdb.org/vehicles.php?make=Hyundai&model=County&page=5
https://www.imcdb.org/vehicles.php?make=Hyundai&model=County&page=6
https://www.imcdb.org/vehicles.php?make=Hyundai&model=County&page=7
https://www.imcdb.org/vehicles.php?make=Hyundai&model=County&page=8
https://www.imcdb.org/vehicles.php?make=Hyundai&model=County&page=9

List:
https://www.imcdb.org/search.php?resultsStyle=asList&sortBy=0&make=Hyundai&model=- County
https://www.imcdb.org/search.php?resultsStyle=asList&sortBy=0&make=Hyundai&model=- County&page=2

Wiki:
https://ko.wikipedia.org/wiki/%ED%98%84%EB%8C%80_%EC%B9%B4%EC%9A%B4%ED%8B%B0#e-%EC%B9%B4%EC%9A%B4%ED%8BED%8E%98%EC%9D%B4%EC%8A%A4%EB%A6%AC%ED%94%84%ED%8A%B8_(- CN,_2008%EB%85EC%9B%94~2012%EB%85EC%9B%94)

For All Model Year Change Please (Hyosung Sense)
https://www.imcdb.org/vehicles_make-Hyosung_model-Sense.html
https://www.imcdb.org/vehicle_1647944-Hyosung-Sense.html
https://www.imcdb.org/vehicle_2094374-Hyosung-Sense.html
https://www.imcdb.org/vehicle_1752434-Hyosung-Sense.html

2007 -> MY2008 Change Please For 2007 November
https://www.imcdb.org/vehicles.php?make=Kia&model=Granbird&modelMatch=1&modelInclModel=- on&page=3
https://www.imcdb.org/vehicles.php?make=Kia&model=Granbird&modelMatch=1&modelInclModel=- on&page=4
https://www.imcdb.org/vehicles.php?make=Kia&model=Granbird&modelMatch=1&modelInclModel=- on&page=5
https://namu.wiki/w/%EA%B8%B0%EC%95%84%20%EA%B7%B8%EB%9E%9C%EB%B2%84%EB%93%9C#s-2.2.1
https://ko.wikipedia.org/wiki/%EA%B8%B0%EC%95%84_%EA%B7%B8%EB%9E%9C%EB%B2%84%EB%- 93%9C#2%EC%84%B8%EB%8C%80

Possibly from there:
https://imcdb.org/vehicle.php?id=1269605
I updated them:
https://imcdb.org/search.php?resultsStyle=asList&model=Typ+SY
https://imcdb.org/search.php?resultsStyle=asList&model=Typ+SZ

The chassis code for the 2nd gen VW Crafter and MAN TGE should be [Typ SY] for the van and [Typ SZ] for the chassis cab, not [Typ 7C0]:

https://imcdb.org/vehicles.php?resultsStyle=asImages&yearFrom=&yearTo=&makeMatch=- 2&make=&modelMatch=1&model=typ+7c0&modelInclModel=on&modelInclChassis=on&mk=&origin=- &madein=&madefor=&role=&page=1

I don't know where the [Typ 7C0] code came from originally, but if you look at the VIN of any Crafter/TGE, you'll see that SY/SZ is the correct one.

For All Model Code [VC] (Hyundai Mega Truck) added Please
https://www.imcdb.org/search.php?resultsStyle=asList&sortBy=0&make=Hyundai&model=- Mega+Truck
https://namu.wiki/w/%ED%98%84%EB%8C%80%20%EB%A9%94%EA%B0%80%ED%8A%B8%EB%9F%AD#s-2
https://ko.wikipedia.org/wiki/%ED%98%84%EB%8C%80_%EB%A9%94%EA%B0%80%ED%8A%B8%EB%- 9F%AD

For All Model Code [TRA] (Hyundai New Power Truck) added Please
https://www.imcdb.org/search.php?resultsStyle=asList&sortBy=0&make=Hyundai&model=- New+Power+Truck&modelMatch=1&modelInclModel=on
https://en.wikipedia.org/wiki/Hyundai_New_Power_Truck