2020 Mercedes-Benz Metris: Transmission & Axle Ratios

Transmission Gear Ratios

The 2020 Mercedes-Benz Metris comes equipped with a single transmission option: the 7G-TRONIC PLUS 7-speed automatic. This advanced transmission is designed to provide a smooth, efficient delivery of power from the turbocharged 2.0L engine to the rear wheels.

7G-TRONIC PLUS (722.9)

Available Axle Ratios

Unlike many North American-market commercial vans, the Metris simplifies the ordering process by offering a single, optimized rear axle ratio. This ratio is engineered to provide an ideal balance between acceleration, towing capability, and highway fuel economy for its target applications.

This "one-size-fits-all" approach ensures that whether you have a Passenger Van or a Cargo Van, the gearing is optimized for the van's 2.0L M274 turbocharged four-cylinder engine, providing responsive performance for city driving while keeping RPMs low for efficient highway cruising.

How to Identify Your Axle Ratio

Since all 2020 Metris vans share the same 3.47:1 final drive ratio, there is typically no need to identify different options. However, if you need to confirm specifications for parts replacement or verification, this information can be found in a few key places.

• VIN Decoder: The most reliable method for any vehicle. Online VIN decoders can provide a detailed build sheet for your specific Metris, listing the final drive ratio along with engine, transmission, and other factory-installed equipment.
• Owner's Manual/Dealership: Your vehicle's owner's manual or a quick call to a Mercedes-Benz dealership with your VIN can also confirm the factory-equipped axle ratio.
• Axle Housing Stamp: In some cases, the ratio may be stamped directly onto the differential housing or on a metal tag affixed to it, though this can be difficult to access and read.

Towing vs. MPG Impact

The 3.47:1 axle ratio in the Metris is a strategic choice aimed at balancing two competing goals: towing/hauling power and fuel efficiency.

A numerically higher ratio (e.g., 4.10:1) provides more torque multiplication. This is excellent for towing heavy loads from a standstill, but it causes the engine to run at higher RPMs on the highway, which increases fuel consumption and cabin noise.

A numerically lower ratio (e.g., 3.08:1) is better for fuel economy. It keeps engine RPMs low at cruising speeds, saving fuel. The trade-off is reduced towing capacity and potentially sluggish-feeling acceleration when heavily loaded.

The Metris's 3.47:1 ratio, when paired with the 7-speed transmission's wide spread of gears, offers the best of both worlds. The deep first gear (4.38:1) provides ample torque for getting a loaded van moving, while the very tall overdrive gears (0.82:1 and 0.73:1) ensure quiet, efficient highway travel.

Common Issues

The Mercedes-Benz 7G-TRONIC transmission and the rear axle used in the Metris are generally considered robust and reliable, especially in the later years of production. There are no widespread, common issues specific to the 2020 model year driveline. However, as with any complex mechanical component, regular maintenance is key to longevity. Adhering to the manufacturer's recommended service intervals for transmission fluid and differential fluid changes is the best way to prevent premature wear and ensure a long service life.

Need to service your van's transmission or differential? Find a certified driveline technician in your area. Find a driveline shop on Repairius.