Includes service guides for the standard front MacPherson struts and rear trailing arms. Crucially, it should detail the troubleshooting steps for vehicles equipped with optional rear electronic air suspension (ENR), which frequently suffers from compressor or height sensor failure. Essential Torque Specs and Maintenance Data Specification / Value ~6.5 Litres Must meet MB 229.51 / 229.52 spec Engine Oil Capacity (OM642 V6) ~10.0 Litres Requires low-ash oil for DPF preservation Wheel Lug Bolts Tighten in a star pattern Front Brake Caliper Guide Pins Clean and grease thoroughly Oil Pan Drain Plug Always replace the crush washer Troubleshooting Common W639 Faults Using the Manual
: Pre-2007 models are particularly prone to rust on tailgates, sills, and wheel arches; a good manual will include bodywork and interior trim removal instructions to inspect these areas. Where to Find Manuals w639 workshop manual
Detailed procedures for cylinder head removal, piston replacement, and full engine rebuilds. 2. Transmission and Drivetrain Includes service guides for the standard front MacPherson
| Publisher | Best for | W639 Coverage | Format | |-----------|----------|----------------|--------| | | General DIY (oil, brakes, belts) | Vito & Viano 2003–2014 (Haynes #6345) | Paperback / PDF scan | | Bentley Publishers | None – they focus on passenger cars only | ❌ No W639 manual | – | | Autodata | Torques, timings, diagnostic codes | Yes – via subscription or DVD | Digital | | emanualonline.com | Scanned dealer bulletins | Viano / Vito 2003–2014 | PDF download (~$15-25) | Where to Find Manuals Detailed procedures for cylinder
: Manually reset service indicators through the dashboard interface without needing expensive diagnostic computers.
The W639 relies heavily on a complex network of control modules. Your manual must include complete wiring schematics, fuse box layouts (under the passenger seat and engine bay), and CAN bus network testing procedures to locate battery drains or communication faults. 4. Suspension, Steering, and Brakes