Driving can sometimes present challenges, and for me, a significant one was the difficulty in clearly seeing the speedometer. This issue led me to explore solutions, and I found an effective answer in implementing an Obd2 Head Up Display (HUD). This device projects crucial driving information directly onto the windshield, right in the driver’s line of sight, significantly improving visibility and driving safety.
The installation process was surprisingly straightforward. The HUD unit is designed to be connected to the car’s OBD2 port, which is typically located beneath the dashboard. For my installation, I routed the data cable from the OBD2 port up into the dash, ensuring it was tucked away to prevent any entanglement or damage. This cable management is crucial not only for aesthetics but also for safety, keeping the wiring away from footwells and preventing potential hazards to the car’s electronic systems.
The cable routing continued towards the door vent cover on the left side of the dashboard. By gently pulling back the door seal and then the plastic vent cover, I could easily access the space behind it. This allowed me to neatly route the cable under the plastic vent cover on top of the dash, utilizing a small gap to keep the wiring concealed and the installation clean. This step-by-step approach ensures a non-intrusive setup that integrates seamlessly with the vehicle’s interior.
Calibration was a necessary step to ensure the accuracy of the speed readings. The HUD initially displayed a speed slightly higher than the actual speed. By adjusting the default calibration setting from 108% to 105% based on the CAN bus speed signal, I achieved a much more accurate reading. Now, at highway speeds, the displayed speed is only marginally higher (approximately 1 mph at 70 mph), which is perfectly acceptable for everyday driving. This fine-tuning is essential for reliable and trustworthy information from the OBD2 head up display.
One of the concerns with aftermarket electronic devices is their power consumption. Fortunately, this OBD2 HUD is designed to be energy-efficient. According to manufacturer specifications from a previous video, its power draw is less than 150 milliamperes even at full brightness. This minimal power consumption is reassuring, suggesting that leaving it plugged into the OBD2 port should not excessively drain the vehicle’s battery.
While my experience with the OBD2 head up display has been overwhelmingly positive – effectively solving my speedometer visibility issue – a question lingers regarding the long-term impact of constantly having such a device connected to the OBD2 port. I am particularly interested in hearing from Mercedes technicians or automotive electronics engineers who might have insights into whether continuous use could potentially introduce any stress or premature wear on the vehicle’s electronic systems. So far, the benefits in terms of safety and convenience have been significant, but understanding any potential long-term effects is crucial for informed and responsible vehicle modification.
For those interested in exploring this solution, the SHEROX 3.5″ Car HUD Head Up Display is the model I used. It is readily available from online retailers like Amazon, offering a plug-and-play solution for enhancing driving information visibility.
