Upgrading the sound system in your 2020 Mercedes-Benz A-Class Sedan can transform your in-car audio experience, turning everyday drives into immersive listening sessions. Whether you enjoy crisp vocals, booming bass, or crystal-clear instrumentals, enhancing your vehicle’s audio setup allows you to enjoy music, podcasts, and calls with exceptional clarity and depth. While the factory-installed system in the A-Class provides a solid foundation, aftermarket upgrades can unlock far greater sound fidelity and customization options tailored to your preferences.

Step 1: Assess Your Current Audio Setup

Before diving into upgrades, it’s essential to thoroughly evaluate the existing sound system in your 2020 Mercedes-Benz A-Class Sedan. The base model typically comes equipped with a standard audio setup that delivers adequate sound quality for casual listening. However, if your vehicle includes the optional Burmester® surround sound system, you already have one of the best factory-installed audio experiences available, featuring multiple high-end speakers strategically placed throughout the cabin for immersive sound.

To determine where improvements can be made, start by identifying the components installed in your car:

  • Speakers: Count how many and what type of speakers are currently installed. Stock A-Class models usually feature six to eight speakers, but higher trims or those with Burmester packages have more advanced speaker arrays.
  • Head Unit (Infotainment System): Examine the capabilities of your current head unit, including connectivity options, touchscreen responsiveness, and pre-installed equalizer settings.
  • Amplifier: Check if your car has a built-in amplifier and its power output. Amplifiers help drive speakers with adequate power, reducing distortion at higher volumes.
  • Subwoofers: Determine whether your vehicle includes a subwoofer for enhanced bass response. Factory systems often have limited bass, so adding or upgrading this component can significantly improve sound richness.

After confirming your existing setup, listen critically to your audio system. Identify any weaknesses such as muddled bass, tinny highs, or a lack of volume without distortion. This assessment will guide you in selecting the right upgrades that address your personal listening preferences.

Step 2: Choose Your Upgrades

Upgrading your A-Class’s sound system involves selecting components that complement each other and fit seamlessly within the vehicle’s interior. Here are the primary upgrade options to consider:

Speakers

Factory speakers are often designed to meet cost and durability standards but may not deliver the clarity or range that audiophiles desire. Upgrading to high-quality aftermarket speakers can drastically improve sound reproduction by offering better frequency response, improved sensitivity, and enhanced power handling.

  • Component Speakers: These separate the tweeter, midrange, and woofer into individual units, allowing precise placement and superior sound staging. Installing component speakers in the front doors and dash can provide a more natural and dynamic audio experience.
  • Coaxial Speakers: These combine tweeters and woofers in a single unit and are easier to install. They offer a balanced upgrade for those seeking improved sound without complex wiring.

Brands such as Focal, JL Audio, and Alpine offer speakers specifically engineered for luxury vehicles, balancing performance with aesthetic design to blend seamlessly into your A-Class’s interior.

Amplifiers

An amplifier is critical for driving upgraded speakers more effectively. While the stock amplifier in a standard A-Class may suffice for basic audio needs, aftermarket amplifiers provide increased power output, which results in clearer sound, less distortion at higher volumes, and better control over speaker performance.

  • Class D Amplifiers: Known for their efficiency and compact size, these amplifiers are excellent for fitting in tight spaces without compromising power.
  • Multi-Channel Amplifiers: These allow you to power multiple speakers and subwoofers independently, giving you precise control over the audio distribution in your car.

When selecting an amplifier, ensure it matches the power handling capacity of your speakers to avoid damage and achieve optimal sound quality.

Subwoofers

One common limitation of factory systems is insufficient low-frequency output. Adding a dedicated subwoofer can dramatically enhance bass response, giving music a fuller, richer sound. Subwoofers come in various sizes and enclosure types to suit different vehicle configurations and space constraints.

  • Powered Subwoofers: These units include a built-in amplifier and are easier to install, often fitting under seats or in the trunk.
  • Component Subwoofers: Separate subwoofers paired with external amplifiers offer higher power and flexibility but require more installation effort.

Consider your space limitations in the A-Class sedan and your bass preferences when choosing a subwoofer. Professional installers can help recommend the best size and enclosure type for your vehicle.

Head Units and Connectivity

Modern head units are the control center for your vehicle’s audio system. Upgrading this component can add features such as Apple CarPlay, Android Auto, Bluetooth streaming, and customizable equalizers. The 2020 A-Class comes with the Mercedes-Benz User Experience (MBUX) infotainment system, which offers many advanced features, but some drivers may prefer enhanced functionality or a more intuitive interface.

  • Touchscreen Units: Larger and more responsive touchscreens provide easier control over music, navigation, and phone integration.
  • Digital Signal Processors (DSP): Adding a DSP can dramatically improve sound quality by allowing precise tuning of frequency response, time alignment, and crossover points.

Before replacing the head unit, verify compatibility with your vehicle’s steering wheel controls, safety systems, and OEM wiring to ensure seamless integration.

Step 3: Professional Installation

While some enthusiasts may attempt DIY installation, professional installation is highly recommended for several reasons:

  • Expertise: Professional installers have extensive knowledge of the A-Class’s electrical system, ensuring that upgrades are installed correctly without damaging factory wiring or electronics.
  • Sound Optimization: Professionals can fine-tune speaker placement, amplifier settings, and crossover adjustments to maximize sound quality and balance throughout the cabin.
  • Warranty and Support: Many aftermarket parts require professional installation to maintain their warranty. Additionally, installers often provide support and troubleshooting assistance post-installation.
  • Aesthetic Integration: Experienced technicians ensure that upgraded components blend seamlessly with your vehicle’s interior, preserving the luxury feel and avoiding unsightly modifications.

Look for installers who specialize in Mercedes-Benz vehicles or luxury cars to ensure your A-Class receives the highest level of care. Many authorized audio shops will offer a consultation to recommend the best setup based on your preferences and budget.

Step 4: Fine-Tune Your System

Once your new sound system is installed, the next step is to fine-tune it for the best listening experience. This involves adjusting the equalizer settings, balance, and fade to suit your personal preferences and the vehicle’s acoustics.

Equalizer Settings

Use the built-in or aftermarket equalizer to adjust the frequency bands. For example:

  • Bass: Increase to add depth and power, but avoid over-boosting to prevent distortion.
  • Midrange: Adjust for clear vocals and instruments.
  • Treble: Enhance for crispness and detail without harshness.

Many modern systems also include presets for different music genres such as rock, jazz, or classical, which can be a good starting point for customization.

Balance and Fade

Adjust the balance control to center the soundstage, ensuring that audio is evenly distributed between the left and right speakers. Use the fade control to balance sound between the front and rear speakers, depending on your seating position.

Time Alignment and Sound Staging

Advanced systems with DSPs allow you to set time alignment, which delays sound from speakers closer to you so that all audio reaches your ears simultaneously. This creates a more natural soundstage, making it feel like the music is coming from in front of you instead of from the doors.

Test with Different Audio Sources

Play a variety of music genres and audio sources to evaluate the overall performance. Use high-quality audio files or streaming services with lossless options to truly appreciate the improvements.

Additional Tips and Considerations

Maintaining Factory Features

When upgrading, it’s important to preserve your A-Class’s built-in features such as voice commands, steering wheel audio controls, and safety alerts. Work with installers who can retain these functionalities or provide adapters that integrate aftermarket components with your car’s original systems.

Budget Planning

Upgrading a car audio system can range from modest improvements costing a few hundred dollars to extensive overhauls reaching several thousand. Prioritize upgrades based on your listening habits and budget. For example, if you primarily listen to podcasts and talk radio, focusing on clarity and midrange speakers may be more beneficial than adding deep bass.

Soundproofing and Acoustic Treatments

Consider adding sound-deadening materials inside door panels and the cabin to reduce road noise and vibrations. These treatments create a quieter environment, allowing your upgraded sound system to perform at its best.

Regular Maintenance

Keep your sound system components clean and check wiring connections periodically to avoid issues. Avoid exposing speakers to excessive moisture and protect subwoofer enclosures from damage.

Conclusion

Upgrading the sound system in your 2020 Mercedes-Benz A-Class Sedan is an investment that pays dividends in driving enjoyment. By carefully assessing your current setup, selecting high-quality components like speakers, amplifiers, subwoofers, and head units, and relying on professional installation, you can achieve exceptional audio fidelity tailored to your tastes. Fine-tuning the system and maintaining the original vehicle features ensures a seamless blend of luxury and performance. Whether you’re cruising through city streets or embarking on long road trips, a premium sound system will make every journey more enjoyable and memorable.