The BMW E39 M5 is a legendary performance sedan, revered by enthusiasts for its potent S62 V8 engine, balanced chassis, and classic yet purposeful design. While much attention is rightly paid to its mechanical prowess, the true genius of BMW engineering often lies in the details that enhance the driving experience. Among these is the BMW E39 M5 rear-view mirror, a component far more sophisticated than a simple reflective surface.
More Than Just Reflection: The E39 M5’s Intelligent Mirror
Far from a basic piece of glass, the E39 M5 rear-view mirror was a technological marvel for its time, designed to enhance both safety and convenience. Its key features include:
- Auto-Dimming (Electrochromatic) Functionality: This is perhaps its most significant feature. The mirror automatically darkens when bright lights, such as high beams from a trailing vehicle, are detected. This anti-dazzle capability reduces glare, preventing driver fatigue and improving night-time safety. It works using an electrochromatic gel or fluid sandwiched between two pieces of glass, which changes opacity when an electric current is applied, controlled by light sensors on the mirror.
- Integrated HomeLink Universal Garage Door Opener: For ultimate convenience, many E39 M5 models integrated the HomeLink system directly into the rear-view mirror. This allowed drivers to program up to three garage doors, gates, or home security systems, eliminating the need for bulky remote controls cluttering the cabin.
- Digital Compass Display: A subtle yet useful feature, a digital compass was often integrated into the mirror’s display, providing immediate directional information to the driver.
Common Issues and Maintenance
While advanced, the E39 M5 rear-view mirror is known for a specific common issue: the electrochromatic fluid leak. Over time, the seals around the fluid-filled element can degrade, leading to:
- Discoloration: The mirror surface may appear yellow, brown, or black, often with a distinct “bubble” or “fluid” pattern.
- Streaking: Visible streaks of the fluid may appear on the reflective surface.
- Loss of Auto-Dimming: The mirror may no longer dim effectively, or certain areas may remain clear while others are discolored.
When this occurs, drivers often seek E39 M5 mirror repair or replacement. Options range from specialized services that rebuild the mirror’s internal components, replacing the leaking fluid and seals, to sourcing a new or refurbished unit. Maintaining this specific component is crucial for preserving the car’s original functionality and aesthetic.
The Significance
The BMW E39 M5 rear-view mirror is a prime example of BMW’s commitment to detail in creating the “Ultimate Driving Machine.” It wasn’t just about raw power; it was about integrating sophisticated technology to make the driving experience safer, more comfortable, and genuinely luxurious. For any E39 M5 owner, understanding and maintaining this often-overlooked yet vital component is part of cherishing this iconic performance sedan.
