1998 Mercedes S420 Service Manual
Comprehensive service manual for the 1998 Mercedes S420. Covers engine, transmission, chassis, and A/C systems. Includes detailed diagrams and procedures. PN 119.981
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Mercedes Models Covered & Key Technical Specifications
Models: Mercedes-Benz S420, S500, SL500, CL500, E420
Sub-models / Variants: Long Wheelbase, Standard Wheelbase, Sedan, Wagon, 4-Matic, 4.2L V8, 5.0L V8
Build Years: 1997–1998
Serial Numbers: 140.043 (S420 Long Wheelbase), 140.032 (S320 Standard Wheelbase), 140.033 (S320 Long Wheelbase), 140.051 (S500 Long Wheelbase), 129.067 (SL500), 140.070 (CL500)
Technical Data:
- Engine Displacement: 4.2L (256 Cu. In.), 5.0L (305 Cu. In.)
- Engine Configuration: V8 (119.9xx series)
- Compression Ratio: 11.0:1
- Horsepower: 275 @ 5700 RPM (4.2L), 315 @ 5600 RPM (5.0L)
- Torque: 295 ft-lbs @ 3900 RPM (4.2L), 347 ft-lbs @ 3900 RPM (5.0L)
- Fuel System: ME-SFI (Motor Electronics Sequential Fuel Injection)
- Cylinder Head Bolt Torque: 55 Nm (Step 1)
- Connecting Rod Bolt Torque (119.98 Engine): 40 Nm (Step 1), 30 Nm (Step 3)
- Crankcase Oil Capacity: 8.5 qts. (8.0L) with filter change
Mercedes Manual Features & Content Preview
1998 Mercedes-Benz S420 Technical Publication
- Covers 1997–1998 Mercedes-Benz S420, S500, and CL500 models featuring 4.2L and 5.0L V8 engine configurations
- Official Mitchell Repair Information Company article, first edition 1998, copyright 1998–2010
- Contains 10 detailed torque specification tables and 12 engine component assembly diagrams
- File link appears in your order confirmation straight away
- OCR text layer lets you jump to a torque spec by keyword
- Laid out for standard letter and A4 printing
- This 1998 edition provides the factory-grade engine service and identification parameters required for the M119.9xx engine family used in the S-Class
Engine Service and Identification
This factory-level service publication documents technical data for the 1997–1998 Mercedes-Benz S420 and related V8 variants. It outlines precise procedures for engine identification, covering engine family designations and VIN code applications. The document provides detailed insight into mechanical systems, including camshaft timing, valve clearance maintenance, and cylinder head removal and installation. Specialized sections are dedicated to crankshaft, piston, and rod assembly specifications, alongside comprehensive oiling system and cooling data.
Technical Preview and Specifications
Specification Highlights
The manual includes extensive torque tables for engine assembly, suspension components, and A/C-heater system hardware. Engine oil capacity for the 1998 Mercedes-Benz S420 is documented at 8.0L. Connecting rod bolt torque for the 119.98 engine is specified at 30 Nm at the final stage. The maximum cylinder head bolt length is 162.7 mm, beyond which replacement is required. Cooling system data includes resistance ranges for the coolant temperature sensor, such as 450–650 ohms at 85°C. For technicians needing further information on what factory workshop documentation is structured to provide, this file serves as a baseline reference.
Note: This page is a contents overview for the manual. It does not provide repair or diagnostic instructions. An official 1998 Mercedes-Benz S420 OEM-based service publication covering the 1997–1998 4.2L and 5.0L V8 engine range, documenting engine identification, valve timing, assembly torque values, and detailed inspection criteria for professional-grade maintenance.
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