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Mercedes-Benz · Known Issues

2024 Mercedes-Benz S-Class Problems: 1 Known Issue

2024 model year · 600+ owner reports · Updated September 2026

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Issue summary

According to Au7o's analysis of 600+ owner reports, the 2024 Mercedes-Benz S-Class has 1 documented issue. None of the listed issues is rated critical; this is not a complete reliability assessment. The most commonly reported issue is 48V Mild Hybrid Battery Issues with 600 owner reports. Across all issues with published estimates, repair costs range from $200 to $3,000. DIY maintenance guides at au7o.io.

In This Article

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In This Article

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  • FAQ

All 1 Known Issue

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Community reported
600 owners

On the 2021-2025 Mercedes-Benz S-Class, the 48V EQ Boost mild hybrid system battery degrades or fails prematurely, triggering multiple warning messages and disabling the start-stop, electric boost, and regenerative braking functions. Software glitches also cause false battery fault warnings.

This issue also affects: Mercedes-Benz C-Class, Mercedes-Benz CLS-Class, Mercedes-Benz E-Class

Common Symptoms

  • Multiple electrical warning messages on dashboard
  • Start-stop system disabled

How to Fix

Have the dealer diagnose with XENTRY to differentiate between a software fault and genuine battery failure. Update to the latest software calibration. If the 48V lithium-ion battery has failed, replacement runs $1,500-3,000 at the dealer.

Owner tips & cautions

  • TipRequest the latest XENTRY software update before approving a battery replacement. Many 48V fault codes are resolved by software calibration alone.
Typical repair cost:$200 - $3,000

Research This Issue

Based on 600 owner reports

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Community Reported
Medium Confidence600 owner reportsLast reported by owners Dec 2025Reviewed Mar 2026
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Other Mercedes-Benz Models

Mercedes-Benz GLE24Mercedes-Benz E-Class23Mercedes-Benz GLS23Mercedes-Benz Sprinter22Mercedes-Benz A-Class22Mercedes-Benz GLC22

Frequently Asked Questions

What are the most common Mercedes-Benz S-Class problems?

According to Au7o's analysis of 600+ owner reports, the 2024 Mercedes-Benz S-Class has 1 documented issue. The documented issue is: 48V Mild Hybrid Battery Issues. None are rated critical, but regular maintenance is recommended.

Is the Mercedes-Benz S-Class reliable?

The 2024 Mercedes-Benz S-Class has 1 known issue documented across 600+ owner reports. None of the matching records is rated critical; this is not a complete reliability assessment. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Mercedes-Benz S-Class problems?

Repair costs for known Mercedes-Benz S-Class issues range from $200 to $3,000, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2021-2025 Mercedes-Benz S-Class 48V Mild Hybrid Battery Issues?

The 48V EQ Boost mild hybrid system battery degrades or fails prematurely, triggering multiple warning messages and disabling the start-stop, electric boost, and regenerative braking functions. Software glitches also cause false battery fault warnings. Repairs typically run $200-$3,000. Severity: medium.

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.

Data sourced from 600+ owner reports, NHTSA recalls, TSBs, and automotive forums.