Electronic Control Module (ECM) Malfunctions

With numerous sophisticated electronic systems, the S-Class is susceptible to issues with its various control modules. These can affect anything from engine management to infotainment and safety systems, often requiring dealer-level diagnostics and programming. Estimated repair cost: $500 - $2,000+.

Over time, rubber hoses, seals, and plastic components in the cooling system can degrade, leading to coolant leaks. This can cause the engine to overheat, potentially leading to more severe damage. Estimated repair cost: $300 - $1,000.

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2014 Mercedes-Benz S-Class Maintenance guide

Name: Maintenance dataset for 2014 Mercedes-Benz S-Class
Creator: Carfocal

v1.0Updated Jun 14, 2026Ethan Miller4 Sources Analyzed

MAINTENANCE SUMMARY

The 2014 Mercedes-Benz S-Class, with an 'Excellent' public reliability verdict, presents a generally robust ownership experience. However, potential owners should be aware of the inherent complexity of its advanced systems.

View Critical Issue: Air Suspension System Failure

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Reliability Score

Est. Annual Maintenance Cost

$150 - $300

TSBs & Recalls

0 TSBs | 0 Recalls

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Key Takeaways

The 2014 Mercedes-Benz S-Class boasts an 'Excellent' public reliability rating.
No recalls or complaints were logged in the provided data, suggesting a high level of initial quality.

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Critical service intervals

Common failure analysis

Symptoms and prevention guidance