1992 Mercedes Benz260E, 300CE, 300E, 300TE, 300E 4MATIC & 300TE 4MATIC Maintenance Manuals

• Primary M103 application: 1987-92 124.026 2.6-liter sedan (260E/300E 2.6, M103.940); 1986-92 300E (124.030/M103.983); 1988-89 300CE (124.050/M103.983); 1988-89 300TE (124.090/M103.983); and 1990-93 300E/300TE 4MATIC (124.230 and 124.290/M103.985).
• Engine repair coverage includes engine removal and installation, cylinder-head and crankcase work, crankshaft and piston service, hydraulic valve-clearance compensation, camshaft timing, timing-chain replacement, lubrication, and cooling-system procedures.
• KE-Jetronic/CIS-E and ignition diagnosis covers fuel-pressure and leak testing, fuel-distributor and airflow-sensor-plate work, injection valves, cold-start and idle checks, on/off-ratio testing, fuel-pump relays, EZL ignition testing, and related wiring diagrams.
• Drivetrain and 4MATIC work includes transmission removal with the torque converter, control-pressure cable adjustment, 4MATIC-specific engine and front-axle procedures, hydraulic-system bleeding, fault-memory material, and VG30 transfer-case service data.
• Chassis, steering, and brake procedures address springs and dampers, self-leveling suspension, Sportline setup, wheel alignment, front and rear axles, ASD differential work, steering-gear and pump repair, brake hydraulics, ABS, and ASR testing.
• Electrical, body, and climate-control material provides connector, relay, ground, fuse, and data-link locations, along with HVAC tests, central locking, power windows, roof systems, lighting, instruments, SRS, seats, doors, glass, and wagon-tailgate repair.
• 2,500-page compiled PDF: a 66-page Model Year 1992 Models 124/129/201 introduction, a separate 68-page 400E/500E introduction, and 2,366 pages of indexes, maintenance sheets, factory repair jobs, service information, electrical material, technical modifications, programmed repairs, and supplemental reference articles.

M103 Fitment and Included Publications

This is a compiled W124/M103 service library, not just the February 1992 introduction booklet. The core repair sheets and introduction publications are Mercedes-Benz material; the compilation also contains navigation pages and clearly separate contributor-written reference articles. The 1992 introduction was written for Mercedes-Benz service personnel, and the full set is best suited to technicians or experienced W124 owners who can work from factory job numbers, metric specifications, special-tool references, and system schematics.

The model-to-component tables are especially useful when confirming a car before parts or procedures are selected. They pair 1992 chassis and engine codes with the applicable manual or automatic transmission and power-steering gear. The Sportline section adds spring, damper, rubber-mount, ride-height, and alignment cross-references for the listed 124.030/051 and 201.029 configurations.

M103 Repair and 602.962 EDS Coverage

The M103 material reaches well beyond routine service. It includes compression and cylinder-leak testing, cylinder-bore measuring and honing, cylinder-head pressure testing and resurfacing, crankshaft and piston repair, valve-guide and valve-seat work, camshaft and timing-chain setup, and component-specific torque, clearance, wear-limit, pressure, capacity, and electrical-test data. KE injection coverage combines operating descriptions with fault isolation and component replacement rather than treating fuel delivery as a single assembly.

The embedded 1992 introduction also documents the 602.962 Electronic Diesel System: injection-system components, electronic idle-speed control, EGR, boost-pressure control, vacuum routing, impulse fault-memory readout, an electrical test program, and follow-up function tests. It covers the diesel system changes and diagnostics, not a complete 602.962 engine overhaul. The same insert discusses selected 1992 changes for models 124, 129, and 201; those references do not expand the primary M103 fitment list above.

4MATIC, Electrical, and Workshop Reference

For the 4MATIC models, the set distinguishes ordinary rear-drive jobs from 124.230/290 procedures and includes the VG30 exchange-unit bulletin. That bulletin identifies a transfer-case production change at exchange-unit end number 1587 and the matching revised AV/ZS piston seals, preventing earlier and modified parts from being mixed. The repair instructions also flag two easy-to-miss damage points: an incorrectly seated torque converter can irreparably damage the converter and primary pump, while the wrong bolt length during KE airflow-sensor work can damage the position indicator.

Representative visuals include KE-injection function and wiring diagrams, 602.962 EDS block/function and vacuum-routing diagrams, Model 124 connector/relay/ground-location views, automatic-climate-control circuit and flap-vacuum diagrams, central-locking function and wiring diagrams, and the transmission oil-cooler wiring diagram. EDS test equipment is identified by part number, including socket box 124 589 00 21 00 and test cables 124 589 33 63 00 and 124 589 34 63 00; the ABS section references tester 124 589 22 21 00.

Some electrical and maintenance material extends into later model years or other W124, W129, and W201 configurations, so applicability should be checked by chassis, engine, and job heading. Fuel-pressure, brake and steering hydraulics, compressed suspension springs, SRS components, and electrical circuits require the isolation, support, and depressurization precautions specified for the job before repair work begins.