Description

Mercedes Benz S, CL, E, SL, CLS 2011 Training Manual

You get a 722.9 transmission on the lift. Customer says it’s slipping in 5th. You pull the pan, see the wrong fluid, and now you’re chasing solenoid codes. Without the factory training material, you’re guessing. This 28-page Training Manual from Mercedes Benz covers the 722.9 (7G-Tronic) as installed in the 2011 Mercedes Benz S, CL, E, SL, CLS 2011 Training Manual. It tells you exactly what fluid goes in, which solenoid does what, and how the shift strategy works. No aftermarket fluff.

722.9 Transmission Coverage

This manual focuses on the W7A 700 variant of the 722.9 transmission. Mercedes Benz introduced the 5th generation electronic gearbox with seven forward and two reverse speeds. Vehicle applications include the S, CL, E, SL, and CLS models, plus the SLK (R171 from 09/04) and later M, R, G classes. The document lists which models will never get the 722.9—like the W163, R170, and V463—saving you from chasing parts that don’t exist. Shift-by-wire on the W164/W251/X164 is covered explicitly, including the electronic shift control module location on the left rear side of the transmission above the pan rail.

What Fluid Does the 722.9 Take?

Mercedes Benz developed a new transmission fluid called ATF 3353. The manual states this fluid has higher friction consistency, thermal stability, and temperature rating. It is backward-compatible with earlier 722.3/.4/.5/.6 transmissions. No scheduled maintenance is required—it’s a fill-for-life design. Page 26 gives the Mercedes part number A001 989 45 03 10 and lists Shell and Fuchs as suppliers in 1-liter bottles. If you see anything other than that pink fluid in the pan, you’re looking at a contamination problem. This is the kind of specific data that keeps you from reusing the wrong fluid and burning up clutches.

Get the Solenoid Identification Right

Eight solenoids are integrated into the valve body assembly. The manual names them all: Working Pressure Control Solenoid (Y3/8y1), K1, K2, K3 clutch solenoids, B1, B2, B3 brake clutch solenoids, and the Torque Converter Lock Up Solenoid (Y3/8y8). That’s exactly what you need when a code points to an open circuit in a specific solenoid. No guesswork about connector pinouts or resistance values—the manual gives the OEM labels. Pair that with the three speed sensors (turbine, internal, output) and the selection range sensor, and you have a complete sensor map for diagnosing shift complaints.

Electronic Control Components: What the Manual Lists

The Transmission Control Module (Y3/8n4) is flash-capable, and every component is detailed. Two oil floats (31 and 32) monitor fluid level and condition. The manual also explains the variable shift programming via the S/C button on the electronic shifter, same as the 722.6. You get the factory logic behind the shift strategy improvements: shorter computer reaction time by 0.1 second, downshifts shortened by up to 0.2 seconds, coasting downshifts shortened by 0.4 to 2.5 seconds. Acceleration from 37–47 MPH is improved by 23–28% depending on model, fuel consumption drops up to 4%, and noise levels are reduced by lower engine speeds in 5th, 6th, and 7th. That kind of performance data helps you explain to a customer why an update matters.

7 Forward Speeds and 2 Reverse – Shift Strategy Details

Two basic shift programs are available (Economy and Sport) with flexible adaptation to vehicle and engine. The manual covers the shift strategy improvements in plain language. No vague references—it gives percentage improvements and model dependency. This Training Manual is a diagnostic cheat sheet for anyone rebuilding or repairing the 722.9. If you are working on a 2011 S550, CL550, E350, SL550, or CLS550, this document belongs on your bench. Compare it to aftermarket wiring guides that often list the wrong solenoid resistances; this is the source material. For related factory documentation, see the Mercedes-Benz Truck 2010 Training Manual – Air Brake & Suspension and the Mercedes-benz 327 2004 Training Manual – Brake Assist System. Also check the Mercedes-benz 212 2009 Training Manual – Factory Systems Guide for chassis-specific electrical diagrams. For broader automotive context, refer to Automotive Industry Overview and Automotive Industry Overview.

FAQ – Two Common Questions

Does this manual cover the 4MATIC models?

No. The manual states it covers only select non-4MATIC (2WD) vehicles with the M113 engine starting MY 2004.

Where can I find the recommended torque values for the valve body bolts?

Torque specifications are not listed in this 28-page Training Manual; it is a training document focused on component identification, fluid specifications, and shift strategy. For production torque values, you need the factory Workshop Manual which includes tightening sequences and angles. This training manual does, however, give the solenoid locations and fluid type so you can order the correct parts before you start the job. Page 26 has the ATF 3353 part number and supplier information. If you are rebuilding the valve body, buy the factory workshop manual alongside this training document.

Stop wasting billable hours with aftermarket interpretations. Get the factory source. Access the Factory Manual from AutoRepairManuals and keep it within arm’s reach of your diagnostic scanner.