Smart Fortwo 451 No Reverse Gear, C1034 DTC Fixed

This smart fortwo came to our garage with no reverse gear and C1034 DTC, so, we diagnosed and rectified the no reverse gear condition (problem) and briefly recorded the diagnosing, repair procedure and uploaded the video here, which could help some one confronted the same problem or issue.
Disclaimer:
this video only contains tips and recommendations that could be useful when carrying out vehicle repairs or replacement parts,  STANHOPE AUTO REPAIR CENTRE WARDAK is not liable for any damage, harm injury or property damage incurred while carrying out repairs or replacement that are a result of incorrect use or misinterpretation of the provided information purposes only and does not guarantee achievement of specific result. The user is personally liable for incorrect use of repair equipment, tools or vehicle parts, in particular, when this use poses the risk of injury. STANHOPE AUTO REPAIR CENTRE WARDAK strongly recommends being careful and adhering to the safety rules when doing any repair or replace.