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2003 Mercedes-Benz M-Class Overview, Reviews, Ratings & Specs

Rating: 4.38
Based on 22 Owner Reviews
Eugene S | March 31, 2025
The 2003 Mercedes-Benz M-Class is a mid-size luxury SUV, part of the first generation (W163) produced from 1997-2005. Available as a 4-door SUV, key trims included the ML320 and ML500. Initially, the pricing ranged from around $37,000 to $47,000. It was popular for offering Mercedes-Benz luxury and prestige in a more practical SUV format. Its blend of on-road comfort and decent off-road capability set it apart.
The Good

The 2003 M-Class offered a comfortable ride and a luxurious interior (appeal to emotional buyers). Performance was adequate, especially with the V8 engine. Practically, it provided ample cargo space and offered a degree of off-road capability, while maintaining Mercedes-Benz build quality at a reasonable price point for a luxury SUV.

The Bad

Common weaknesses of the 2003 M-Class include electrical issues, particularly with the door locks and windows. The automatic transmission can be prone to problems. Rust can develop, especially in areas with harsh winters. Suspension components, like the air suspension (if equipped), can also be problematic and expensive to repair.

2003 Mercedes-Benz M-Class: Quick Overview

  • Engine Options:
    • ML320: 3.2L V6
    • ML500: 5.0L V8

  • Horsepower:
    • ML320: 215 hp
    • ML500: 288 hp

  • Fuel Economy (estimated):
    • ML320: 16 mpg city / 20 mpg highway
    • ML500: 14 mpg city / 18 mpg highway

  • 0-60 mph Times (estimated):
    • ML320: 9.5 seconds
    • ML500: 7.2 seconds

  • Towing Capacity:
    • Up to 5,000 lbs (properly equipped)

  • Trim-Level Features:
    • ML320: Standard features included leather upholstery, power-adjustable front seats, a sunroof, cruise control, automatic climate control, a premium sound system, and alloy wheels.
    • ML500: Added features over the ML320 typically included upgraded leather, wood trim, heated front seats, a more powerful sound system, and sometimes optional navigation. Both models often had optional packages that could add features like a CD changer, upgraded wheels, and various appearance enhancements. The ML55 AMG was available, but is not the ML500, with significantly upgraded performance and styling.

2003 Mercedes-Benz M-Class Specifications

Vehicle Information
Year 2003
Make Mercedes-Benz
Model M-Class
Trim -
Style -
Type Wagon
Category Minivan Medium Truck
Manufacturing Details
Made In United States
Manufacturing City -
Dimensions
Doors -
Curb Weight -
Gross Vehicle Weight Rating -
Overall Height -
Overall Length -
Overall Width -
Wheelbase Length -
Standard Seating -
Engine & Performance
Engine 5.0L V8
Engine Size 5L
Engine Cylinders 8
Transmission -
Transmission Type -
Transmission Speeds -
Drivetrain All-Wheel Drive
Additional Features
Anti-Brake System -
Steering Type -
Pricing
Manufacturer Suggested Retail Price (MSRP) -
Invoice Price -
Delivery Charges -

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Analysis

What Problems Does the 2003 Mercedes-Benz M-Class Have?

The 2003 Mercedes-Benz M-Class is known for a few frequently reported problems. Electrical issues are common, including malfunctioning power windows, door locks, and sometimes the climate control system. The automatic transmission, particularly in earlier model years (including 2003), has been known to experience slipping or rough shifting, eventually requiring costly repairs or replacement. Rust is another concern, especially in regions where salt is used on roads. The undercarriage and body panels are susceptible to corrosion. Air suspension systems (if equipped) can develop leaks and require expensive repairs. Other reported problems include issues with the mass airflow sensor, oxygen sensors, and catalytic converters. There have been some recalls related to fuel filter issues and potential airbag malfunctions. Long-term reliability is a concern due to the age of the vehicle and the complexity of its systems. Regular maintenance and careful inspection are crucial to keeping it running reliably.

How long will the 2003 Mercedes-Benz M-Class last?

A well-maintained 2003 Mercedes-Benz M-Class can potentially reach 200,000 miles or more. However, many examples will have accumulated significant mileage by now. Years of service heavily depend on maintenance habits. Regular oil changes, fluid flushes, and timely repairs are critical. Long-term durability is challenged by potential rust, electrical problems, and transmission wear. Suspension components, bushings, and seals will likely need replacement over time. Neglecting maintenance can significantly shorten the lifespan and increase repair costs.

What Technology & Safety Features are Included?

The 2003 Mercedes-Benz M-Class offered a reasonable array of tech and safety features for its time. Standard entertainment included a premium sound system with a cassette player and CD player. Optional features included a CD changer and a navigation system (which was rudimentary by modern standards). Driver-assistance features were limited compared to modern vehicles, but included cruise control and anti-lock brakes (ABS). Safety features included front and side airbags, traction control, and stability control.

Crash-test ratings from the NHTSA (National Highway Traffic Safety Administration) generally showed good performance. However, specific ratings should be verified for the 2003 model year on the NHTSA website. Optional features could include rain-sensing wipers and parking sensors.

The built-in tech is definitely dated by today's standards. Don't expect smartphone integration or advanced driver-assistance systems like lane departure warning or blind-spot monitoring. The focus was more on providing a comfortable and safe driving experience with the technology available at the time.

What Colors Options are Available?

Exterior Colors
Black
Arctic White
Brilliant Silver Metallic
Andradite Green Metallic
Midnight Blue
Desert Silver Metallic
Graphite Grey Metallic
Jade Green Metallic
Magma Red
Jasper Blue Metallic
Orion Blue Metallic
Interior Colors
Black Leather
Ash Leather
Orion Grey Leather
Java Leather

2003 Mercedes-Benz M-Class Prices and Market Value

When new, the 2003 Mercedes-Benz M-Class had an MSRP ranging from approximately $37,000 to $47,000, depending on the trim level and options. Today, used market prices typically range from $3,000 to $8,000, depending on condition, mileage, and location. Depreciation has been significant due to age and high maintenance costs associated with older luxury vehicles. Factors affecting resale value include overall condition (rust-free examples command a premium), service history, and the presence of desirable options. High mileage and deferred maintenance will significantly lower the value.

2003 Mercedes-Benz M-Class Cost of Ownership

The 2003 Mercedes-Benz M-Class is generally considered costly to own long-term. Insurance premiums can be higher than average due to its luxury brand and potential repair costs. Fuel economy is poor. Maintenance and repair costs are also elevated, as parts can be expensive and require specialized labor. Unexpected repairs are common as vehicles age. Overall, while the initial purchase price might be low, be prepared for higher ongoing expenses.

2003 Mercedes-Benz M-Class Fuel Efficiency

Fuel Type Gasoline
Fuel Capacity -
City Mileage -
Highway Mileage -

2003 Mercedes-Benz M-Class Safety Rating

NHTSA
Overall Rating Not Tested
Overall Frontal Star Rating Not Tested
Side Overall Star Rating Not Tested
Overall Rollover Star Rating Not Tested
Combined Front Seat Rating Not Tested
Combined Rear Seat Rating Not Tested
Overall Frontal Star Rating Not Tested
Frontal Barrier Star Ratings Not Tested
Side Barrier Star Ratings Not Tested
Rollover Resistance Star Rating Not Tested

2003 Mercedes-Benz M-Class Insurance

Insurance for a 2003 Mercedes-Benz M-Class is moderately priced, reflecting its status as a Wagon with strong safety ratings and
reasonable repair costs.

How Does the 2003 Mercedes-Benz M-Class Compare to Other Wagon?

The 2003 Mercedes-Benz M-Class competed against other luxury SUVs like the BMW X5, Lexus RX 300/330, and Acura MDX. In terms of performance, the BMW X5 generally offered a sportier driving experience, while the Lexus RX prioritized comfort and smoothness. Features were comparable across the segment, but the M-Class lagged behind the Lexus RX in reliability ratings. The Acura MDX offered a more spacious interior and a reputation for dependability.

Price-wise, the M-Class was positioned competitively, but used examples are now similarly priced to its rivals.

Alternatives to consider include the Lexus RX 330 for superior reliability and the Acura MDX for a more practical and dependable option. The BMW X5 is a good choice if driving dynamics are a priority, but expect higher maintenance costs. If reliability and lower running costs are important, the Lexus and Acura are generally better choices than the Mercedes M-Class.

Ranks #700 SUV

Final Verdict: Is the 2003 Mercedes-Benz M-Class a Good Wagon?

The 2003 Mercedes-Benz M-Class is ideal for someone who appreciates the Mercedes-Benz brand and is willing to accept the potential for higher maintenance costs to own a luxury SUV on a budget. It is only worth buying used, and only if a thorough pre-purchase inspection is performed by a qualified mechanic. Look for examples with documented service history and minimal rust. The ML320 is generally preferable for slightly better fuel economy and lower repair costs than the ML500, unless the buyer specifically desires the V8 power. Be prepared to budget for potential repairs. If reliability is a top priority, consider alternatives.

2003 Mercedes-Benz M-Class Owner Reviews

4.38
Consumer Rating, Based on 22 Consumer Reviews
Overall rating
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Anthony Nwosu on June 12, 2020

Most reliable car I have owned lately

This is a great car, nice handling , nice hieght but many sensors but good 4matic .... The off road capability is awesome that you don't even need to engage the ausxilary which is just a button away on the dash

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John on January 6, 2019

Clean and comfortable!

This vehicle is clean and comfortable! I love the heated seats. It is a pleasure to drive. It has 128,000 miles. It has been well maintained.

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Patrick on December 6, 2018

200,000 miles and runs great

Bought for my son to go to college daily. After 1,100 worth of repairs it runs like a new car despite the high miles.Love it.

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Tspeed1 on October 30, 2018

Most Reliable Family Vehicle

This car was very reliable and low maintenance. It was great in the snow and rainy weather. I enjoyed driving the M-class (320 and 350) because it drives more like a car - smooth and comfortable. I have kids and dogs - so the M-Class was perfect for us!

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ML500Number1 on July 4, 2018

Best SUV Ever

My third SUV and I love it. I had no major issues for 100,000 miles. And I bought it and it had 120,000 miles on it. Very Fast, Very Strong. Interior tough but comfy.

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Okwahu on January 27, 2018

Most reliable car

This vehicle meets all my needs, safe and reliable. Comfortable and has great value. I love Mercedes

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Oleg on January 21, 2018

SUV is beautiful condition

No damage. No mechanical problems, everything works, no warning lights. Bluetooth. CD-DVD. MP3. USB. Fully loaded, leather, power and heated seats, sunroof, steering wheel controls, roof rack, chrome rims, good tires. Year: 2003 Make: Mercedes Benz Model: ML350 Mileage: 118014 Engine: 3.6L V6 Fuel Type: Gasoline Transmission: Automatic 5-Speed Drivetrain: 4WD City MPG: 14 Highway MPG: 18

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Enobabe on September 12, 2017

ML350 Inspiration Edition SUV

I bought this vehicle in 2013. It has been a real delight! Heavy on the road, it gets really awful mileage, but it sure is fun to drive. I'm fairly small, so it was important to find an SUV that gives me enough seat adjustment to boost up and let me see the road. I love this vehicle.

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ashleyp22 on August 28, 2017

Love it!

I loved the car, it ran so nicely and it was great. I love the color and everything about it. It had good tires and ran smoothly

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CaitlinD on August 1, 2017

Least reliable car I've owned!

This car is fantastic looks wise, exterior and interior, but things were always breaking! Yes, it's older, but it had things breaking from the moment I bought it.

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Eugene S

Eugene is an automotive enthusiast with over 15 years of experience in the used car market. As a writer at VINCheck.info, he brings deep industry insight and a passion for cars, helping readers make smart, informed decisions. Eugene has written hundreds of used car reviews and is known for breaking down complex automotive topics into clear, actionable advice. Over the years, he has driven and worked on a wide range of vehicles—starting with tuning street cars in his early days and eventually focusing on performance upgrades and reliability improvements. Today, he specializes in evaluating used vehicles through the lens of real-world ownership and enthusiast needs. A longtime fan of Porsche, Eugene especially appreciates vehicles that blend durability with driving enjoyment.