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Home >> Mercedes Benz >> 2019 >> C300 4Matic, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 347 (Electrical System, Equipment & Instruments - 253 Chassis 5 Of 9) >> Retrofitting & Conversion >> Retrofit Wiring Harness For Mercedes-Benz Dashcam At Rear With Existing Mercedes-Benz Dashcam At Front >> Retrofit Wiring Harness For Mercedes-Benz Dashcam At Rear With Existing Mercedes-Benz Dashcam At Front - AZ54.71-P-0003-01RFW

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

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 253.3 

WARNING 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
G14471764Courtesy of MERCEDES-BENZ USA

Connection scheme 

Routing diagram 

G14471765Courtesy of MERCEDES-BENZ USA
  1. Expose strapped down branch-off line (arrow M) for rear dashcam.
    G12823831Courtesy of MERCEDES-BENZ USA
  2. Expose black plug (8.1) of dashcam wiring harness (8).

    IMPORTANT To do this, remove the fabric tape (41) and pocket (40) from dashcam wiring harness (8).

    G12621955Courtesy of MERCEDES-BENZ USA
    G12823754Courtesy of MERCEDES-BENZ USA
  3. 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.
  4. Route branch-off line for dashcam at rear of dashcam wiring harness (8) from driver's side fuse and relay module to A-pillar.

    IMPORTANT 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).

    G12621906Courtesy of MERCEDES-BENZ USA
    G12823754Courtesy of MERCEDES-BENZ USA
  5. Position window airbag shackle and attach mounting clamps (4) for window airbag to A-pillar at top.
  6. Route branch-off line for rear dashcam of dashcam wiring harness (8) on roof lining towards rear up to center of roof lining.

    IMPORTANT Route branch-off line for rear dashcam behind mounts for front and rear grab handles (arrows E).

  7. Strap down excess lengths of dashcam wiring harness (8) in area of A-pillar.
  8. Then fasten dashcam wiring harness (8) on roof lining using felt adhesive tape.

    Shown with removed roof lining 

    G12823798Courtesy of MERCEDES-BENZ USA
  9. Remove rear roof frame cover (31).
    G12823799Courtesy of MERCEDES-BENZ USA
  10. Open bracket (32) on left side of vehicle and remove cable duct (33).
  11. Remove cable duct (33) from liftgate and from rear roof frame.
    G12823800Courtesy of MERCEDES-BENZ USA
  12. Route dashcam wiring harness (8) through opening (arrow F) up to opening for cable duct on roof frame at rear.

    IMPORTANT Use a pull-through device. Pull this through opening for rear cable duct up to opening (arrow F).

    Shown with removed roof lining 

    G12823801Courtesy of MERCEDES-BENZ USA
  13. Route dashcam wiring harness (8) through cable duct (33) into liftgate.
  14. Route dashcam wiring harness (8) by dimension (a) beyond center of liftgate (line b) to the right.

    IMPORTANTDimensions  :

    a = 300 mm

    Use a pull-through device. Silicone spray must be applied to the cable duct (33) on the inside before routing.

  15. Fix dashcam wiring harness (8) in place using cable ties (arrows G).
  16. Attach cable duct (33).
    G12823802Courtesy of MERCEDES-BENZ USA