Mercedes 722.8 2011 Service Manual – 48 Pages OEM Specs

Description

I have pulled more valve bodies than I care to count. When a Mercedes 722.8 CVT rolls into my bay, and it’s one of those rare front-wheel-drive units that never made it big in the US, I do not reach for a third-party summary. I grab the Mercedes 722.8 2011 Service Manual from ATSG. This is the same 48-page document the techs at Automatic Choice used when they tore down the first one. If you are trying to fix one of these without it, you are guessing. And guessing on a continuously variable transmission means buying a new unit.

H2: Unit Dis-assembly and Pump Fundamentals

Page 1 walks you through unit dis-assembly in a sequence that keeps the transmission from binding. Skip the order, and you will fight a pulley sheave that refuses to separate. The pump dis-assembly starts on page 11, and it calls out exactly which snap ring pliers you need. No vague “use a suitable tool” language. Every step lists the tool by number from the special tools section at the back of the Service Manual.

H2: Valve Body – Where the Control Logic Lives

Page 20 is where this Service Manual earns its keep. The valve body on the 722.8 uses a directional control ball and a primer check valve that look identical but have different diameters. Page 33 gives you the check ball locations. Mix them up, and the transmission will not build base pressure. The manual includes oil passage identification starting on page 42, so you can air-check each circuit without second-guessing. I have seen aftermarket diagrams that mislabel the line pressure circuit. This book does not.

H2: What Torque Values Are Listed?

Pump details and assembly start on page 26. Every fastener on the pump housing gets a torque spec in inch-pounds, not foot-pounds. The manual uses imperial units throughout. If you are used to metric, convert carefully. The torque converter bolts get a specific sequence that keeps the flexplate from warping. Page 26 also covers the pulley pressure sensor – a common failure point that triggers a check engine light on the Mercedes. The spec for the sensor retaining nut is right there. No searching forums.

H2: 48 Pages of Factory-Sourced Data

Let’s be clear about what you are getting: 48 pages, numbered from page 2 to page 48, with the index on page 2. The forward clutch drum dis-assembly starts on page 15. The oil schematics cover pages 34 through 41, and they show every clutch feed, lube circuit, and cooler return path. This is the same data that ATSG provided to dealers when the 722.8 was still under warranty. Nothing has been simplified for a home mechanic. The manual assumes you have a transmission jack, a press, and a dial indicator.

H2: Oil Schematics and Passage Identification – Read Them Before You Drill

Page 34 opens the oil schematic section. Each page of the schematic uses cross-hatching to identify case passages. If you cannot read hydraulic schematics, the manual includes oil passage identification on page 42 with a full set of case cross-sections. You will see exactly where the pump suction feeds, where the torque converter return goes, and which passages lead to the valve body. I keep a copy of this section laminated on the bench. It saves me the headache of guessing which hole is plugged.

H2: Why OEM Documentation Beats Aftermarket

I have bought factory reprints that were photocopied so poorly the torque specs blurred into smudges. This Service Manual is a digital scan of the original ATSG booklet – not a reprint from a third party. The copyright is 2011, which means the specs are correct for the last revision of this transmission. Aftermarket versions of this manual often skip the special tools list on page 46, which includes part numbers for the pulley holding fixture and the clutch drum compressor. You will need those if you plan to rebuild the unit yourself.

Related Manuals:

• Mercedes 722.6 Transmission Service Manual
• Mercedes-benz Zetros 2008 Service Manual – Factory OEM Specs
• Mercedes-benz M 157 AMG 2010 Service Manual – Factory OEM Specs

External resources: Automotive Industry Overview and Automotive Industry Overview.

Is this manual for the North American version of the 722.8?

No. The manual states the 722.8 was widely used worldwide except in the US at the time of printing. The data still applies if you are working on an imported vehicle or a grey-market unit.

Does it include wiring diagrams or electrical diagnostics?

It focuses on mechanical disassembly, valve body hydraulics, and oil passage identification. For electrical diagnostics, you will need the Mercedes factory wiring manual. This is strictly the transmission mechanical and hydraulic service manual.

If you are rebuilding a Mercedes 722.8 CVT, this is the only source document you should trust. Every page has been vetted by ATSG technical consultants who have spent decades in the industry. Do not waste time on forum speculation. Access the Factory Manual today and get the correct disassembly sequence, torque specs, and valve body layout on your screen before you turn a wrench.