1989 Mercedes-Benz 300TE Service Manual (OEM)

• Covers the 1989 Mercedes-Benz 300TE, plus 190E, 260E, 300E, 300CE, 300SE, 300SEL, 420SEL, 560SL, 560SEL, and 560SEC variants
• Original OEM publication from the 1998 Mitchell Repair Information Company
• Contains 14 detailed engine and A/C compressor torque specification tables
• Includes 14 wiring diagrams for 260, 300, 420, and 560 series climate systems
• Documents system operating pressures for 300TE climate control
• Provides essential reference data for engine overhauls and climate control diagnostics

Engine and Climate Control Coverage

This service manual documents engine identification, removal, and installation procedures. It provides detailed overhaul specifications for the 2.6L and 3.0L 6-cylinder engines. Workshop professionals get exact protocols for timing chain replacement and camshaft timing adjustment using modified rocker arms. It also outlines valve guide inspection and seat replacement. High technical depth is maintained throughout. You will find precise cylinder head tightening sequences and piston-to-rod assembly specifications to ensure reliable engine rebuilds.

Beyond the engine block, the manual covers A/C compressor servicing. It breaks down the isolation and repair of various compressor units, including Atsugi, Bosch, Harrison, Hitachi, Matsushita, Nippondenso, and Sanden. Technicians can reference component replacement steps, oil level checks, and thorough electrical or vacuum system diagnostics. The climate control section maps out the entire A/C and heater system. It includes critical sensor resistance tables for in-car, outside, evaporator, and heater core temperatures to speed up diagnostic time.

Specification Highlights

Precision is critical when working on these classic European engines. Cylinder head bolt torque follows a strict three-stage sequence. It starts at 55 Nm (41 ft. lbs.) and finishes with a 90-degree angle tightening. Engine oil pressure must read 0.5 kg/cm² (7.1 psi) at idle, rising to 3 kg/cm² (42 psi) at 3000 RPM. The total crankcase capacity is 6.5L (6.9 qts) with a filter change. Intake valve clearance is listed between 0.030 and 0.045 mm. For cooling, the auxiliary fan stage 2 kicks on at 107°C (225°F) and shuts off at 100°C (212°F), managing a total coolant capacity of 6.5 liters. Always observe standard shop safety protocols when executing these procedures. Ensure vehicle stability on a certified lift and verify system depressurization before opening high-pressure climate control lines to prevent severe injury.