Segment:
Compact Executive Sedan
Era:
Late 1980s to early 1990s luxury automotive segment
Competitors:
BMW 3 Series (E30), Audi 80/90, Saab 900, Volvo 240/740
Engineering Philosophy:
Mercedes-Benz build quality, safety, and engineering prowess in a more compact and accessible package than the E-Class or S-Class.
Popularity:
Known for its robust construction, comfortable ride, and longevity, often referred to as the "Baby Benz".
Applicable Years:
1987, 1988, 1989, 1990, 1991, 1992, 1993
Engine Coverage:
2.6L M103 Inline-6 Engine
Delivery:
Instant Download
Type:
Factory Service & Repair Manual
Estimated Page Count:
Extensive (Factory Manual Scope)
Searchable:
Yes (Fully Bookmarked & Searchable)
Printability:
Yes (All pages printable)
Source:
OEM Factory Files (Not scans)
Engine:
Engine mechanicals, lubrication, cooling, fuel injection (KE-Jetronic), ignition, exhaust, engine mounts, emission controls
Transmission:
Manual transmission (4 & 5 speed), Automatic transmission (4 speed 722.4), clutch system, driveline
Brakes:
Hydraulic system, calipers, pads, rotors, parking brake, ABS (if equipped)
Suspension:
Front and rear suspension, struts, shock absorbers, springs, control arms, ball joints, bushings, leveling control (ADS - optional)
Steering:
Power steering system, steering gear, tie rods, steering column
Electrical:
12V system, battery, charging system, starter, lighting (headlamps, exterior, interior), indicators, warning lamps, horn, wiper/washer system, fuse/relay box
Body And Chassis:
Body structure, corrosion inspection, water leaks, door hinges, locks, hood, sunroof, soft top mechanism (if applicable), windshield wipers/washers, body panels, noise encapsulation
HVAC:
Heating and ventilation system, AC refrigerant charge, dust filter, recirculating air filter, active charcoal filter
Maintenance:
Oil and filter changes, fluid level checks and top-offs, belt inspections and tensioning, air filter replacement, spark plug replacement, fuel filter replacement, coolant replacement, valve clearance adjustment
Diagnostics:
Troubleshooting common issues, diagnosing engine performance problems, identifying electrical faults, brake system diagnostics
Repairs:
Engine component replacement (e.g., oxygen sensor, manifold gaskets), transmission fluid and filter changes, brake pad and rotor replacement, suspension component replacement (ball joints, bushings), clutch system servicing, power steering system repairs
Adjustments:
Idle speed adjustment, injection timing adjustment, parking brake adjustment, steering bolt tightening, wheel bolt tightening
Depth:
Comprehensive from basic maintenance to major component repair and overhaul, including torque specifications, diagnostic procedures, and wiring diagrams (typically within factory manuals).
Era Standard Safety:
Designed to high Mercedes-Benz standards for its time, including crumple zones, safety cage, and energy-absorbing steering column.
ABS:
Anti-lock Braking System (ABS) available as an option on later models.
Airbags:
Driver airbag standard on later models, passenger airbag optional.
Seatbelts:
Front and rear seat belts, pre-tensioners (on later models).
Oil Change Interval:
Typically 7,500-10,000 miles or 12-18 months (refer to manual for precise intervals based on driving conditions).
Air Filter Replacement:
Every 15,000-30,000 miles or as needed based on dusty conditions.
Spark Plug Replacement:
Typically 30,000-60,000 miles (depending on plug type, e.g., standard vs. long-life).
Coolant Replacement:
Every 2-3 years or as specified by coolant manufacturer.
Engine Oil Specification:
MB 229.1 or API SG/SH, SAE 10W-30 or 10W-40 (depending on climate, refer to manual).
Brake Fluid Specification:
DOT 3 or DOT 4.
Power Steering Fluid Specification:
MB 236.3 (e.g., Pentosin CHF 11 S or equivalent hydraulic fluid).
Common Problems:
Head gasket leaks, fuel distributor issues (KE-Jetronic), vacuum hose degradation, front suspension wear (ball joints, bushings), blower motor failure, OVP relay failure (for EFI models).
Valve Adjustment:
Requires periodic checking and adjustment of valve clearances as per factory procedure.
