Remove/Install Trailer Recognition Control Unit - AR31.19-P-1300LWQ
Model 205.4
as of model year 2019
with code 550 (Trailer coupling)
Fig 1: Trailer Recognition Control Unit Component Location - Model 205.4 As Of Model Year 2019 With Code 550 (Shown With Codes B01, 233)
Shown with code B01 (48V technology) and code 233 (Distance Pilot DISTRONIC with Steering Pilot)
| Topical note | Information on preventing damage to electronic components due to electrostatic discharge | AH54.00-P-0001-01A | |
| Notes on safety-relevant components | AH00.00-Z-0019-01A | ||
| Remove/install | |||
| 1 | Carry out commissioning of trailer recognition control unit (N28/1). | When replacing the trailer recognition control unit (N28/1). | |
| AD00.00-P-2000-04B | |||
| 2 | Switch off ignition and store transmitter key outside of transmission range (min. 2 m). | ||
| 3 | Remove luggage compartment well cover. | AR68.30-P-4602LWR | |
| 4 | Remove on-board electrical system battery. | Model 205.4 as of model year 2019 with code 233 (DISTRONIC PLUS) with code 550 (Trailer coupling) with code B01 (48V technology) Model 205.4 as of model year 2019 with code 235 (Active Parking Assist with PARKTRONIC) with code 550 (Trailer coupling) with code B01 (48V technology) Model 205.4 as of model year 2019 with code 550 (Trailer coupling) with code 865 (TV tuner) with code B01 (48V technology) |
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| AR54.10-P-0005LW | |||
| 5 | Remove screws (1), lift bracket (2) and unscrew underlying nut of bracket (5). | Model 205.4 as of model year 2019 with code 233 (DISTRONIC PLUS) with code 550 (Trailer coupling) with code B01 (48V technology) Model 205.4 as of model year 2019 with code 235 (Active Parking Assist with PARKTRONIC) with code 550 (Trailer coupling) with code B01 (48V technology) Model 205.4 as of model year 2019 with code 550 (Trailer coupling) with code 865 (TV tuner) with code B01 (48V technology) |
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| 6 | Unscrew nut (3), remove screws (4) and lift bracket (5) together with the mounted control units and place to one side. | Model 205.4 as of model year 2019 with code 233 (DISTRONIC PLUS) with code 550 (Trailer coupling) Model 205.4 as of model year 2019 with code 235 (Active Parking Assist with PARKTRONIC) with code 550 (Trailer coupling) Model 205.4 as of model year 2019 with code 550 (Trailer coupling) with code 865 (TV tuner) |
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| 7 | Unscrew nuts (6). | ||
| 8 | Lift bracket (7) together with mounted control units far enough until the trailer recognition control unit (N28/1) is accessible. | ||
| 9 | Disconnect electrical connectors (8). | ||
| 10 | Unclip trailer recognition control unit (N28/1) at bracket (7) (arrow) and remove. | ||
| 11 | Install in the reverse order. |