Mercedes-Benz X-Klasse 470 350 d, 258 PS, 7-speed automatic, all-wheel drive (2018–2020)

Research for this car

Gearbox guide Mercedes 7G-Tronic (722.9) 7-speed automatic: problems, costs and what to check
Buy only with fluid records and a clean full-system scan, and avoid any car that has run in limp mode or judders at a steady speed.

Issue	Affects	Typical km	Repair cost	Source
Conductor plate and speed sensor failure	All 722.9 cars; early 2004-2007 builds most	50,000 to 80,000 km	About 850 EUR for the control board (Russia, 2019 press article)	Gearbox guide
Torque converter lock-up clutch judder	All 722.9 cars; a Daimler bulletin covers Plus cars built 2011-2012	100,000 to 200,000 km	No confirmed price	Gearbox guide
Valve body and clutch pack wear	All 722.9 cars	100,000 to 180,000 km	1,500 to 1,700 EUR for a complete mechatronic (Russia, 2019 press article)	Gearbox guide
Old fluid and missed adaptation reset	All 722.9 cars	80,000 to 100,000 km	About 600 EUR for a flush with new fluid (Austria, 2022)	Gearbox guide

Read the shift pressure data with XENTRY or an equal Mercedes scanner. Bad result: pressure deviations above 0.5 bar, or adaptation values above 30 percent. Those point to valve body wear.
Read the full gearbox fault memory with a full-system scanner. An engine-only OBD2 reader does not show it. Bad result: speed sensor codes P0717, P0718, P0722 or P0793, or any stored limp mode.
Test drive cold and warm, and pull away from a stop. Bad result: stuck in 2nd, slipping between 1st and 2nd, or limp mode at about 48 km/h (30 mph).
Hold a steady light throttle at about 60 km/h. Bad result: a shudder or hum. A scanner shows converter slip; 5 to 25 rpm is normal, and above about 80 rpm points to clutch wear.
Ask for the fluid invoices and check the fluid. Bad result: no change after about 80,000 km, dark brown or black fluid, a burnt smell, or a fluid other than the one for the build. A wrong fluid can cause code P0741. Red-amber is the correct colour.

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Listings on mobile.de in this generation with this fuel, gearbox and power.

First registration	Listings	Median price	Median mileage
2020	13	€34,990	107,000 km
2019	43	€35,999	122,117 km
2018	7	€34,000	144,966 km

Medians only for years with at least 5 listings. Many cars are first registered after production ends, so years can run past the build years.

Month	Listings	Median price	Middle half	Median mileage
Nov 2026	63	€35,350	€31,499 – €39,950	120,000 km
Oct 2026	63	€35,350	€31,499 – €39,950	120,000 km

Median asking price at the last snapshot of each month.

All 4 ADAC versions

Version	Power	Production years	Running cost per month
X-Klasse 350 d Progressive Edition 4MATIC 7G-TRONIC	258 PS	2018–2020	–
X-Klasse 350 d Progressive 4MATIC 7G-TRONIC PLUS	258 PS	2018–2020	–
X-Klasse 350 d Power Edition 4MATIC 7G-TRONIC PLUS	258 PS	2018–2020	–
X-Klasse 350 d Power 4MATIC 7G-TRONIC PLUS	258 PS	2018–2020	–