Purpose and Specifications

LIQUI MOLY Top Tec ATF 1900 (3649) is a fully synthetic, low-viscosity transmission fluid designed for Mercedes-Benz 7-speed automatic transmissions (types 722.9 and 724.2 hybrid). It meets MB 236.15 specs and matches OEM part P000238.

This premium 20-liter canister oil uses advanced additives for smooth shifting, reduced fuel use, and better efficiency. Its thin flow cuts drag inside the transmission, helping your engine work less while keeping shifts crisp and reliable. Stable friction properties support longer service life with fewer changes.

• Volume: 20 liters in a sturdy canister
• Operating range: Stays fluid from -40°C cold starts to high-heat towing over 100°C
• Shelf life: Up to 5 years unopened in cool, dry storage

When to Use / Replace?

Use this oil in Mercedes-Benz vehicles needing MB 236.15 approval, like many 7G-Tronic models from 2004 onward. Ideal for fleet shops or high-mileage services.

Replace every 60,000-100,000 km or 4-5 years under normal driving; sooner (40,000 km) for heavy towing, city stop-go, or hot climates. Check fluid level and color monthly - dark or burnt smell means change now to avoid slip or damage.

FAQ

Q: Is this safe for my Mercedes hybrid?
A: Yes, approved for 722.9 and 724.2 hybrid transmissions - shake well and fill undiluted.

Q: Can I mix with other ATF?
A: No, for best results use pure Top Tec ATF 1900. Drain fully before switching.

Q: How much for a full flush?
A: Most 7-speed units hold 8-10 liters total; plan 12-15 liters for safe flush.