Mercedes-Benz GLS-Class, X167 (USA / CAN)

Additional Notes

• The front differential capacity across all Mercedes-Benz GLS-Class X167 configurations — including the GLS 450 4MATIC, GLS 450 4MATIC+, GLS 580 4MATIC, GLS 63 S AMG 4MATIC+, and Maybach GLS 600 4MATIC — is uniformly 0.65 liter, regardless of whether the housing is standard or light alloy.
• The light alloy front differential housing is listed as a separate configuration for the GLS 450 4MATIC, GLS 450 4MATIC+, and GLS 580 4MATIC variants, yet the 0.65-liter capacity figure is identical to the standard front differential entry for each of those variants.
• Two distinct rear differential capacity values appear across the X167 lineup: 1.0 liter and 1.9 liters. The smaller figure typically represents a service or partial fill capacity, while the larger figure corresponds to a full overhaul or dry fill capacity.
• The rear differential change interval for the GLS 450 4MATIC (M256.930) under normal use conditions is 31,000 miles or 36 months, whichever comes first, and both the 1.0-liter and 1.9-liter rear differential entries share that same interval.
• The GLS 450 4MATIC+ (M256.830), identified by engine code M256.830 rather than the M256.930 found in the GLS 450 4MATIC, carries the same rear differential change interval of 31,000 miles or 36 months under normal use conditions, along with the same 1.0-liter and 1.9-liter rear differential capacity figures.
• The GLS 580 4MATIC in chassis code 167.980 covers the 2019-2023 period and lists both a 1.0-liter and a 1.9-liter rear differential capacity, each with a 31,000-mile or 36-month change interval under normal use conditions.
• The GLS 580 4MATIC in chassis code 167.985 lists only the 1.9-liter rear differential capacity, paired with the same 31,000-mile or 36-month change interval under normal use conditions, in contrast to the 167.980 chassis which carries both capacity entries.
• The GLS 63 S AMG 4MATIC+ (167.989) specifications include only a front differential entry at 0.65 liter, with no rear differential capacity or interval data listed for that variant.
• The Maybach GLS 600 4MATIC (167.987) specifications similarly include only the front differential entry at 0.65 liter, with no rear differential data present in the listed specifications.
• All rear differential service intervals across the X167 configurations that carry interval data are expressed under normal use conditions, meaning the 31,000-mile or 36-month threshold applies to standard operating environments rather than severe-duty cycles.