185 litres/ 48.9 gallons for the 2019+ 4x4 Sprinter
ACGB tanks are a full aluminum replacement of the factory fuel tank. There are no fuel transfer pumps or secondary fuel filler ports to install or contend with. Tanks are manufactured in France in an ISO certified manufacturing facility to an extraordinary level of quality.
Price does not include installation.
DIY degree of difficulty - 5/5 (suggest a high level of capability or have professional install)