Retrofit Wiring Harness For Mercedes-Benz Dashcam At Rear With Existing Mercedes-Benz Dashcam At Front - AZ54.71-P-0003-01LWG

WARNING: This page is about a different car, the 2023 Mercedes-Benz GLC300, 2022 Mercedes-Benz GLC300, 2021 Mercedes-Benz GLC300, 2020 Mercedes-Benz GLC350e, and 2020 Mercedes-Benz GLC300. However, it is still accessible from the selected car via links, so may be relevant.

Model 253.9

Risk of injury during testing and repair operations related to pyrotechnical components	Do not expose pyrotechnical component parts to temperatures above 100°C or 212°F. Disconnect current supply when working on such component parts.	AS91.00-Z-0008-01A
Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
Notes on retrofitting electrical/optical lines		AH82.00-P-0000-01A
Notes on safety-relevant components		AH00.00-Z-0019-01A
Information, assessment and legal requirements when working with, handling and storing pyrotechnical components		AH91.00-Z-0000-10A

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1133-06A	Silicone spray Silicone-Fluid, 0.4 l art. no. 0893 221 000	Adolf Wurth GmbH & Co. KG Reinhold-Wurth-Str. 12-17 74653 Kunzelsau-Gaisbach Germany Tel. +49 7940 15-0 Fax +49 7940 15-1000 http://www.wuerth.de
BR00.45-Z-1144-02A	Adhesive tape roll, non-woven Tesa tape, 50 meters, 50 mm wide	A 008 989 50 85 09

Courtesy of MERCEDES-BENZ USA

Connection scheme

Courtesy of MERCEDES-BENZ USA

Expose strapped down branch-off line (arrow M) for rear dashcam.

Courtesy of MERCEDES-BENZ USA
Expose black plug (8.1) of dashcam wiring harness (8).
To do this, remove the fabric tape (41) and pocket (40) from dashcam wiring harness (8).

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA
Use pliers through the openings (arrows H) to press shackles (arrows K) together and remove mounting clamps (4) for window airbag from A-pillar at top.
Route branch-off line for dashcam at rear of dashcam wiring harness (8) from driver's side fuse and relay module to A-pillar.
Route branch-off line for dashcam at rear behind the crossmember for the instrument panel.

Route branch-off line for dashcam at rear above the window airbag (30).

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA
Position window airbag shackle and attach mounting clamps (4) for window airbag to A-pillar at top.
Route branch-off line for rear dashcam of dashcam wiring harness (8) on roof lining towards rear up to center of roof lining.
Route branch-off line for rear dashcam behind mounts for front and rear grab handles (arrows E) and covers of mounting eyes for partitioning net (arrows F).
Strap down excess lengths of dashcam wiring harness (8) in area of A-pillar.
Fasten dashcam wiring harness (8) on roof lining using felt adhesive tape.
Shown with removed roof lining

Courtesy of MERCEDES-BENZ USA
Remove rear roof frame cover (31).

Courtesy of MERCEDES-BENZ USA
Open bracket (32) on left side of vehicle and remove cable duct (33).
Remove cable duct (33) from liftgate and from rear roof frame.

Courtesy of MERCEDES-BENZ USA
Route dashcam wiring harness (8) through opening
next to trunk lid/liftgate control drive unit (M51/3) up to opening for cable duct on rear roof frame.

Use a pull-through device. Pull this through opening for cable duct on roof frame at rear up to opening next to trunk lid/liftgate control drive unit (M51/3).

Shown with removed headliner with code 890 (Automatic rear-end door)

Courtesy of MERCEDES-BENZ USA
Route dashcam wiring harness (8) through cable duct (33) into liftgate.
Route dashcam wiring harness (8) by dimension (a) beyond center of liftgate (line b) to the right.
Dimensions:

a = 150 mm

Use a pull-through device. Silicone spray must be applied to the cable duct (33) on the inside before routing.
Fix dashcam wiring harness (8) in place using cable ties (arrows G).
Attach cable duct (33).

Courtesy of MERCEDES-BENZ USA