1987 Mercedes-Benz 300D Service Manual

1987 Mercedes-Benz 300D Technical Service Documentation

• 100-page OEM-level reference covering the 1983–1987 Mercedes-Benz 300D and related models (190D, 300SDL, 300TD, 260E, 420SEL, and 560 series).
• Instant download delivery directly to your device for immediate shop-floor access.
• Features 23 detailed electrical diagrams, 19 system inspection tables, and 5 engine tightening sequence charts.
• High-resolution formatting preserves exploded-view details and electrical schematics for clear, readable printing.

Engine Specifications and Mechanical Tolerances

Tackling a rebuild on a 601, 602, or 603 series engine requires exact factory data. This guide outlines the essential specifications for the 2.5L 5-cylinder and 3.0L 6-cylinder turbo diesel engines. You get precise tolerances for pistons, rings, camshafts, and hydraulic valve tappets. The manual details the sequences for engine and transmission removal, alongside internal component alignment for the crankshaft, connecting rod bearings, and cylinder head. Every mechanical task is backed by extensive torque specifications and timing data, including the critical multi-stage angle tightening method for cylinder head bolts. Baseline data for cooling, exhaust, ABS, and SRS systems is also fully documented.

Climate Control Diagnostics and Electrical Systems

Stop guessing on electrical faults. This publication delivers complete diagnostics for the automatic climate control system, mapping out the electronic control unit, auxiliary coolant pump, and temperature sensors. You will find hard technical data, including system pressure settings of 24–34 psi (low side) and 230–275 psi (high side). Electrical sections document exact sensor resistance values, such as the required 10,000-ohm reading at 77°F (24°C) for the in-car temperature sensor. Comprehensive inspection tables evaluate heating, ventilation, and air conditioning components against uniform factory standards. Working on these pressurized climate systems and high-voltage components requires strict adherence to standard workshop safety protocols and proper protective gear. Professional technicians and experienced builders will find this technical data indispensable for accurate troubleshooting.