1987 Mercedes-Benz 190D, 300D, 300SDL, 300TD, 260E, 420SEL, and 560 series Service & Repair Manual (OEM)

• Vehicle focus and related applications: Built around the 1987 Mercedes-Benz 300TD Turbo, with shared-system application data for the 190D/190TD, 300D, 300SDL, 260E, 420SEL, and 560-series models where the individual articles identify them.
• A 1,078-page set of 72 PDFs: 345 pages cover engine, fuel, emissions, cooling, and maintenance; 88 cover automatic climate control and A/C; 200 cover electrical systems, restraints, accessories, and wiring; 65 cover brakes and ABS; 84 cover the automatic transmission, drive axle, and drivetrain; 188 cover steering, suspension, and alignment; and 108 provide general diagnostic and reference material.
• Diesel engine repair: Covers 602.911/602.961 2.5L five-cylinder and 603.960/603.961 3.0L six-cylinder applications, including cylinder-head work, timing-chain replacement and valve timing, camshaft and hydraulic tappet inspection, combustion prechambers, pistons, bearings, oil seals, lubrication, and cooling-system service.
• Fuel, turbo, and emissions diagnosis: Details the Bosch mechanical injection pump and Electronic Diesel System (EDS), glow-plug operation, injection-pump timing, idle control, EGR testing, turbocharger boost checks, vacuum controls, and 300TD-specific EGR and vacuum diagrams.
• Transmission and rear axle work: Identifies the 300TD Turbo's 722.317 / W4A040 automatic transmission and covers fluid service, shift and control-pressure cable adjustment, modulating-pressure and vacuum-control checks, neutral-safety switch adjustment, transmission removal/installation, CV axle work, and differential overhaul with pinion-depth and backlash setup.
• Brakes, steering, and wagon suspension: Provides four-wheel disc brake service, Bosch ABS testing, power-steering repair, front strut and five-link rear suspension procedures, wheel-alignment data, and hydraulic pressure testing for the 300TD automatic rear level-control system.
• Electrical, HVAC, and restraint coverage: Supplies a 300D/300TD electrical component locator; multi-page chassis and system wiring for starting/charging, climate control, ABS, lighting, power equipment, tailgate, and rear wiper circuits; plus SRS testing, post-collision inspection data, and NHTSA campaign bulletins 87V073000, 87V132000, and 93V095000.

What the 300TD-Specific Material Actually Covers

This Mitchell Repair Information Company article-print set covers the 1987 300TD Turbo's engine, Bosch diesel fuel system, W4A040 transmission servicing, brakes and ABS, steering, wagon suspension, automatic level control, electrical component locations, accessories, maintenance schedules, and wiring. The files carry a 1998 Mitchell copyright line; eight separate January 2002 Motorist Assurance Program articles add 479 pages of all-makes inspection criteria for HVAC, brakes, drivetrain, electrical, engine, exhaust, steering, and suspension systems.

The material is best suited to professional technicians and experienced owners who can separate Mercedes-specific procedures from the clearly labeled general-reference articles and who have access to appropriate lifting, pressure-test, electrical, and refrigerant-service equipment.

Diesel Engine and Driveline Repair Depth

Engine identification tables tie the 300TD to the 603.960 turbo-diesel, while the related 190D, 300D, and 300SDL applications are identified by engine designation and code. The repair material covers cylinder-head removal and tightening order, split-link timing-chain installation, cam timing checks, camshaft bearings, valves and guides, hydraulic tappets, prechambers, piston-ring installation, cylinder liners, crankshaft and connecting-rod bearings, front and rear oil seals, the oil pump, and water pump. Specifications are organized into torque, engine, valve, piston/ring, bearing, valve-spring, camshaft, compression, glow-plug, charging, and fluid-capacity tables.

Named service equipment includes Chain Press 000 589 57 43 00, SRS Tester 126-589-10-21-00, level-control Pressure Tester 126 589 02 21 00, and Coil Spring Compressor 201 589 00 31 00. The axle chapter documents differential teardown and setup. It warns that overtightening the pinion nut over-compresses the collapsible spacer and requires the pinion to be removed again for spacer replacement. The diesel fuel section likewise cautions against disturbing the injection-pump element connection below the delivery-pipe fitting because pump recalibration will then be required.

Diagrams, Diagnostics, and Workshop Scope

Representative illustrations include the Cylinder Head Tightening Sequence, Timing Chain & Related Components, Electronic Diesel System Wiring Diagram, 300D/300TD/300SDL Vacuum Hose Diagram, 300E/300D/300TD Automatic A/C-Heater System Diagram, and Exploded View of Mercedes-Benz Drive Axle Assembly. Separate wiring PDFs add component-location grids and system circuits for the cooling fan, defogger, horn, seats, windows, locks, mirrors, antenna, radio, tailgate closing assist, and all three wiper/washer systems.

The automatic climate article explains the push-button control panel, temperature sensors, heater valve, auxiliary coolant pump, ECU, blower control, vacuum-operated air doors, evaporator regulator, auxiliary fan, expansion valve, and compressor protection. For the 300D, 300SDL, and 300TD, however, model-specific testing is limited to the compressor cut-out test, and 260E/300-series HVAC removal and installation procedures are not supplied. The shared diesel-engine article provides engine/transmission assembly removal sequences for the 190D and 300SDL, not a dedicated 300TD engine-removal sequence. Automatic-transmission coverage is diagnosis, service, adjustment, and removal/installation rather than a full internal gearbox rebuild.

Refrigerant must be recovered with approved equipment before the A/C system is opened. ABS and level-control hydraulics require proper pressure handling, heavy assemblies and compressed springs must be securely supported, and the SRS must be disabled before steering-column or airbag repair.