2006 Mercedes-Benz Allegro Service and Repair Manual

This factory service and repair manual for the 2006 Mercedes-Benz Allegro documents a cab-forward bus chassis with one door, classed as a non-school bus. Power comes from a turbocharged diesel inline-six displacing 6.4L, or 389 cubic inches, and the sole trim designation is OMC 1626/51L /51AL. The manual covers the diesel's mechanical and fuel systems, the drivetrain and the chassis, giving the specifications and torque values a workshop needs.

Engines covered

• 6.4L inline-six (389 cu in) — turbocharged, diesel

Body styles covered

• 1-door bus (non school), cab forward

Trims covered

• OMC 1626/51L /51AL

Known issues on the 2006 Allegro. Keeping a diesel bus in service depends on accurate figures and a clear diagnostic path. For the 2006 Allegro, the manual provides both: engine procedures for the turbocharged 6.4L inline-six, specifications for its fuel and cooling systems, and torque values for reassembly. Brake, steering and suspension procedures are included, and wiring diagrams cover the electrical systems of the cab-forward layout.