2015 Mercedes-Benz ML250

2015 Mercedes-Benz ML250

Overview

The 2015 Mercedes-Benz ML250, part of the W166 generation, is generally regarded as a reliable luxury SUV, particularly known for its comfortable ride and efficient diesel powertrain. While most owners report a positive ownership experience, like any vehicle, it has specific areas that have seen more attention from repair shops. This analysis focuses on documented technical issues beyond routine maintenance, providing insights into potential concerns for owners and prospective buyers. The diesel engine, while offering good fuel economy, has some specific components that may require attention over time. Similarly, some electrical and interior components have been noted for occasional faults.

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Engine

2.1L Turbocharged Diesel (OM651)

Diesel Particulate Filter (DPF) Issues

• Symptoms: Illuminated DPF warning light, reduced engine power, increased fuel consumption.
• Solution: Forced regeneration or DPF cleaning/replacement.
• Cost: $500 - $1500

EGR Valve Malfunction

• Symptoms: Rough idling, poor acceleration, increased emissions, check engine light.
• Solution: Cleaning or replacement of the EGR valve.
• Cost: $400 - $800

AdBlue System Issues

• Symptoms: AdBlue warning lights, reduced engine power, potential failure to start.
• Solution: Inspection and potential repair or replacement of AdBlue pump, sensors, or injector.
• Cost: $600 - $1200

Transmission

7G-TRONIC PLUS Automatic

No widespread issues reported.

• Symptoms: N/A
• Solution: N/A
• Cost: Varies

Suspension

Standard Air Suspension

Air Suspension Leaks

• Symptoms: Vehicle sagging, uneven ride height, compressor running excessively.
• Solution: Leak detection and repair of air lines, seals, or replacement of air springs/compressor.
• Cost: $700 - $2000+

Standard Coil Spring Suspension

No widespread issues reported.

• Symptoms: N/A
• Solution: N/A
• Cost: Varies

Electrical

Infotainment System

COMAND System Glitches

• Symptoms: Screen freezing, unresponsiveness, audio issues, navigation problems.
• Solution: Software updates or potential replacement of the COMAND unit.
• Cost: $300 - $1500

Sensors

Parking Sensor Malfunctions

• Symptoms: False alerts, sensors not detecting obstacles, ‘parking assist unavailable’ message.
• Solution: Cleaning or replacement of faulty parking sensors.
• Cost: $200 - $500

Exterior

Body Panels & Trim

No widespread issues reported.

• Symptoms: N/A
• Solution: N/A
• Cost: Varies

Lighting

No widespread issues reported.

• Symptoms: N/A
• Solution: N/A
• Cost: Varies

Interior

Upholstery & Trim

No widespread issues reported.

• Symptoms: N/A
• Solution: N/A
• Cost: Varies

Climate Control System

Blend Door Actuator Failure

• Symptoms: Inability to control temperature or airflow direction, unusual noises from dashboard.
• Solution: Replacement of the faulty blend door actuator.
• Cost: $300 - $600

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Summary Verdict

The 2015 Mercedes-Benz ML250 offers a generally solid reliability record, especially considering its luxury segment. The efficient 2.1L diesel engine is a strong point, but potential owners should be aware of specific diesel-related maintenance needs like DPF and EGR system care, as well as AdBlue system upkeep. While the transmission and most exterior components are robust, some owners have reported issues with the air suspension system and certain electrical components, particularly the COMAND infotainment and parking sensors. Interior climate control blend door actuators can also be a point of failure. Overall, with proactive maintenance and awareness of these potential issues, the ML250 can be a dependable vehicle.