Rein TSK0021 Transmission Service Kit

Mercedes-Benz 722.9 Transmission Service Kit

Rein TSK0021 is an OE-quality automatic transmission service kit for Mercedes-Benz vehicles equipped with the 722.9 NAG II transmission. It brings together the core service parts needed for the recommended 60,000 to 70,000 mile fluid and filter interval, with OE-style filtration and service components for a proper maintenance job.

Use this kit when servicing a Mercedes-Benz C-Class, E-Class, ML-Class, or other listed 722.9 applications. The Rein TSK0021 package is built around the filter media requirements of the NAG II transmission and is a practical choice for routine transmission maintenance.

Key Features

• 722.9 NAG II automatic transmission preventative maintenance service kit
• Includes OE filter, oil pan gasket, stretch pan bolts, guide tube, and plug washer
• Meets NAG II filter media requirements for the specified transmission
• Supports regular fluid and filter service intervals to help maintain transmission function and service life
• Rein part number TSK0021 for Mercedes-Benz 722.9 applications

Detailed Description

This Rein transmission service kit is built for Mercedes-Benz 722.9 NAG II automatic transmissions, which do not use a traditional dipstick tube for fluid level checks. Service is performed through the drain plug, and the one-time-use fluid guide tube must be punctured during draining and replaced during reassembly. Rein recommends OE or Pentosin ATF-134 ultra-high-performance automatic transmission fluid for this service. The kit is a direct maintenance solution for vehicles such as the Mercedes-Benz C250, C300, E350, ML350, S550, and other listed models.

This part cross-references Genuine 2512710097 for the same application.

What It Helps Address

• Old or degraded transmission fluid
• Restricted fluid flow from a worn filter
• Fluid leaks at the transmission pan gasket
• Service issues caused by reusing stretch pan bolts
• Incomplete maintenance on Mercedes-Benz 722.9 NAG II transmissions

Installation Notes

Drain and refill procedures for the 722.9 transmission are performed through the drain plug, since there is no fluid level dipstick tube. Replace the guide tube during service, and follow the Mercedes-Benz fill and level-check procedure for the specific vehicle. Confirm the exact application by year, model, and transmission configuration before installation. This kit is listed for many Mercedes-Benz models, including Fits 2006-2009 Mercedes-Benz C350, N/A and Fits 2007-2009 Mercedes-Benz E550, N/A, along with additional 722.9-equipped vehicles.

Quality Assurance

Rein TSK0021 is an OE-quality service kit built to match the specified filter media requirements for the Mercedes-Benz 722.9 NAG II transmission. Warranty coverage is 24 months or 24,000 miles.