Remove/Install Trailer Recognition Control Unit - AR31.19-P-1300LWG
Model 253.3/9 with code 550 (Trailer coupling)
Shown on model 253.9
| Risk of injury caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof. | No parts of the body or limbs should be within the operating area when the components are moving. | AS00.00-Z-0011-01A | |
| Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC) | Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines. | AS00.00-Z-0035-01A | |
| General information on handling vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system | AH00.00-Z-0300-01A | ||
| Information on preventing damage to electronic components due to electrostatic discharge | AH54.00-P-0001-01A | ||
| Notes on HANDS-FREE ACCESS | Model 253.3/9 with code 550 (Trailer coupling) with code 871 (Sensor system for trunk lid opening/closing) with code 889 (KEYLESS-GO) |
AH80.61-P-0001-01A | |
| Remove/install | |||
| 1 |
Perform initial startup 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 (at least 2 m) | ||
| 3 | Fold up load compartment floor (1) and secure against unintended folding down | ||
| 4 | Fold load compartment well trim to one side | ||
| 5 | Separate electrical connectors (2) | ||
| 6 | Unscrew nut (3) | ||
| 7 | Remove trailer recognition control unit (N28/1) from shackle (arrow) | ||
| 8 | Install in the reverse order | ||
| Check | |||
| 9 |
Perform function test on ball neck and on light signals at trailer socket | AN31.10-P-0008-01LWG |