2021 Mercedes-Benz Metris — Transmission Fluid & Service

Quick answer

• Transmission make/model: Mercedes-Benz 7G-TRONIC Plus (722.9)
• OEM fluid spec: MB 236.15 ATF
• Drain & fill capacity: ~5–6 quarts (verify with dipstick)
• Full overhaul capacity: ~9.5 quarts
• Filter OEM part number: Verify with dealer or service manual
• Recommended service interval: 60,000 miles

Fluid type explained

The 2021 Metris uses the Mercedes-Benz 7G-TRONIC Plus (also known as the 722.9) seven-speed automatic transmission. This is a robust, rear-wheel-drive transmission used across a wide variety of Mercedes-Benz cars and vans. It requires a specific low-viscosity automatic transmission fluid, Mercedes-Benz part number 236.15. This is a synthetic fluid designed for optimal performance and fuel economy in this transmission. It is not backward-compatible with older 236.14 fluids. Using the wrong fluid can cause shifting problems and internal damage.

Service procedure

There are two main ways to service the transmission fluid in a 2021 Metris: a drain and fill or a full fluid exchange. A drain and fill is the more common and less expensive option. It involves draining the fluid from the transmission pan, replacing the filter, and refilling with fresh fluid. This typically replaces about half of the total fluid in the transmission. A full fluid exchange is a more thorough process that uses a machine to pump all of the old fluid out of the transmission and replace it with new fluid. This is a more expensive service, but it ensures that all of the old, degraded fluid is removed.

Service interval

Mercedes-Benz recommends servicing the transmission in the 2021 Metris every 60,000 miles. This interval should be followed for both normal and severe duty use. If you frequently tow heavy loads or drive in stop-and-go traffic, you may want to consider servicing the transmission more frequently.

Common transmission problems

The Mercedes-Benz 7G-TRONIC Plus is a reliable transmission, but there are a few common problems to be aware of. These include:

• Harsh shifting: This can be caused by a variety of factors, including low fluid level, old or degraded fluid, or a software issue.
• Slipping: This is a more serious problem that can be caused by worn clutches or a failing torque converter.
• Noises: Whining or grinding noises from the transmission can indicate a serious internal problem.

If you are experiencing any of these problems, it is important to have your vehicle diagnosed by a qualified technician as soon as possible.

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