Mercedes-Benz W123 | Manual cover | Volume 1
  • Mercedes-Benz W123 | Manual cover | Volume 1
  • Mercedes-Benz W123 | Rear differential adjustment and measurement
  • Mercedes-Benz W123 | Front axle and control arm installation
  • Mercedes-Benz W123 | Brake system vacuum pump repair
  • Mercedes-Benz W123 | Steering column jacket tube removal

Mercedes-Benz Service Manual Chassis & Body Series 123 | Volume 1

$16.00

Mercedes-Benz W123 workshop manual with technical chassis and body information.

First volume of the Mercedes-Benz Service Manual Chassis & Body Series 123, developed for maintenance, repair and restoration work on W123 series models, including 230, 240 D, 300 D, 280 E, 280 CE, 300 CD, 300 TD and Turbo versions.

English PDF | 810 pages | Instant digital delivery.

  • Original Mercedes-Benz technical information for the W123 series.
  • Covers general data, vehicle identification and specifications.
  • Includes suspension, level control system, axles, wheels and propeller shaft.
  • Contains procedures for brakes, steering, electrical equipment and instruments.
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Mercedes-Benz Service Manual Chassis & Body Series 123 | Volume 1 | PDF

First volume of the workshop manual for chassis and body systems of Mercedes-Benz W123 Series models.

The Mercedes-Benz W123 Series is one of the brand’s most recognized generations, known for its robustness, build quality and long-term reliability. This manual is intended for maintenance, repair and restoration tasks related to the chassis, suspension, axles, propeller shaft, brakes, steering, electrical equipment and vehicle instruments.

This digital PDF edition brings together factory documentation for vehicle identification, technical data, inspection, removal, installation, adjustment and component checking. The content is especially useful for workshops, specialized mechanics, restorers and owners who need to consult original Mercedes-Benz technical procedures applied to the Series 123.

The scope of the manual can be reviewed in greater detail in the Complete index tab, where the included groups and operations are listed according to the original technical structure of the publication.

Main topics covered in this Mercedes-Benz W123 Series chassis and body manual | Volume 1

  • Vehicle identification
  • General technical data
  • Suspension and level control system
  • Front axle
  • Rear axle
  • Wheels
  • Propeller shaft
  • Hydraulic and mechanical brakes
  • Pneumatic brake system
  • Steering
  • Electrical equipment and instruments
  • Inspection, removal, installation and adjustment procedures

W123 Series models listed in the manual application table

  • 230
  • 240 D, 300 D, 300 CD, 300 TD
  • 300 D Turbo, 300 CD Turbo, 300 TD Turbo
  • 280 E and 280 CE

Other Mercedes-Benz W123 Series models for which this manual is also useful

  • 200 and 200 T
  • 230 E, 230 C, 230 CE, 230 T and 230 TE
  • 250, 250 Lang and 250 T
  • 280, 280 C and 280 TE
  • 200 D, 220 D
  • 240 D Lang and 240 TD
  • 300 D Lang

Important: this manual corresponds to Volume 1 of the factory documentation for Mercedes-Benz Series 123. The manual application table mainly lists W123 models intended for the North American market and specific production years, but the publication is organized as a technical manual for the Series 123. For this reason, many chassis, suspension, axle, brake, steering, electrical equipment and instrument operations are common to different sedan, coupe, estate and long-wheelbase variants of the W123 platform. When an operation applies to a specific version, the manual indicates it by the corresponding chassis number.

Workshop manual intended for maintenance, repair and restoration

The content is designed for technical work on chassis, suspension, axles, brakes, steering, wheels, propeller shaft, electrical equipment and instruments. It includes tables, factory values, component references, technical illustrations and sequential procedures that make consultation easier during the repair or restoration of a Mercedes-Benz W123.

As a digital PDF manual, it can be consulted from a computer, tablet or mobile phone, and also allows the necessary pages to be printed for working on the vehicle without handling original printed documentation.

Item features

  • Format: PDF
  • Language: English
  • Pages: 810
  • File size: 51.6 MB
  • Delivery method: download link

Frequently asked questions about Mercedes-Benz Service Manual Chassis & Body Series 123 | Volume 1

What type of technical information does this W123 Series volume provide?

This volume brings together factory documentation related to chassis and body systems, with special focus on vehicle identification, technical data, suspension, level control system, front axle, rear axle, wheels, propeller shaft, hydraulic brakes, pneumatic brake system, steering, electrical equipment, instruments and inspection, removal, installation or adjustment procedures.

Is this manual useful for working on a Mercedes-Benz 300 D W123?

Yes. The 300 D is listed in the manual application table. This documentation is useful for chassis, suspension, axle, brake, steering and other systems covered by this volume, although it does not replace the specific engine manual when internal diesel engine information is required.

Does it include information for coupe and estate models of the W123 Series?

Yes. The application table includes coupe versions such as 280 CE, 300 CD and 300 CD Turbo, as well as estate versions such as 300 TD and 300 TD Turbo. As with all Mercedes-Benz factory documentation, each operation should be checked by technical group and chassis number before applying a procedure to a specific version.

What should be considered before buying this manual?

This product corresponds to Volume 1 of the chassis and body documentation. It is not a parts catalog, it is not an owner’s manual and it does not replace specific documentation for the engine, transmission or systems not included in this volume. Its main value lies in the original technical procedures for the groups covered by this publication.

Is it also useful for other Mercedes-Benz W123 models not listed in the main table?

Yes. Although some W123 Series models are not highlighted in the application table, much of the chassis, suspension, axle, brake, steering and body information is common to the platform. Where differences exist by version, the manual uses chassis numbers or specific references. For this reason, it is also very useful documentation for other W123 variants when working on shared systems.

How is the information organized inside the PDF?

The publication preserves the original Mercedes-Benz technical structure, with numbered work groups, tables, illustrations, technical data and step-by-step procedures. This allows the content to be consulted with greater precision than a generic guide or scattered information.

Why choose this PDF instead of searching for loose information online?

Because it brings together structured technical documentation in a single file, prepared for service work on W123 models. This makes consultation easier during repair or restoration work and reduces the risk of using incomplete, disorganized or non-applicable data for the correct vehicle.

Mercedes-Benz W123 Chassis and Body Manual | Volume 1 | Index

This index lists the main sections and job numbers included in the Mercedes-Benz Service Manual Chassis & Body Series 123 | Volume 1.

Each entry is listed in accordance with the manual’s original technical layout and numbering.

A Instructions for Use of Service Manual

  • Introduction
  • Group index
  • Instructions for Use of Service Manual

00 General, technical data

  • General
  • 00-005 Model and unit survey
  • 00-005 Identification of vehicles
  • Technical data
  • 00-010 Technical data. Models 123.023 (230), 123.033 (280E), 123.123 (240D), 123.130 (300D)
  • 00-020 Technical data. Models 123.053 (280CE), 123.150 (300CD)
  • 00-030 Technical data. Model 123.190 (300TD)
  • 00-040 Technical data. Models 123.133 (300D-Turbo), 123.153 (300CD-Turbo), 123.193 (300TD-Turbo)

32 Suspension, level control system

  • Shock absorbers
  • 32-010 Permissible combinations springs - shock absorbers
  • 32-100 Removal and installation of front shock absorber
  • 32-110 Removal and installation of rear shock absorber
  • 32-120 Checking of shock absorber
  • 32-125 Checking alignment of front shock absorbers
  • 32-126 Checking alignment of rear shock absorbers
  • Springs
  • 32-200 Removal and installation of front spring
  • 32-205 Removal and installation of front spring (In combination with removal and installation of front axle half on vehicles following an accident)
  • 32-220 Adjustment of front springs
  • 32-230 Removal and installation of rear spring
  • 32-240 Adjustment of rear springs
  • 32-250 Test values of springs
  • Torsion bars
  • 32-300 Removal and installation of torsion bar on front axle
  • 32-310 Removal and installation of torsion bar on rear axle
  • Checkups
  • 32-501 Functional description
  • 32-510 Checking spring struts
  • 32-520 Checking pressure reservoir
  • 32-530 Checking pressure oil pump and level controller
  • Assembly jobs
  • 32-610 Removal and installation of spring strut
  • 32-612 Checking and replacing of spring strut (T-sedans)
  • 32-620 Removal and installation of pressure reservoir
  • 32-630 Draining and filling of pressure oil system
  • 32-640 Removal and installation of pressure oil pump
  • 32-641 Conversion of suction and pressure line on model 123 with diesel engine 3rd version
  • 32-645 Replacement of radial sealing ring of pressure oil pump
  • 32-660 Removal and installation of connecting rod of level controller
  • 32-670 Removal and installation of level controller
  • 32-671 Conversion of oil lines between level controller and pressure reservoir in the event of complaints about noise

33 Front axle

  • Front axle halves
  • 33-200 Removal and installation of front axle half
  • Front wheel hub
  • 33-300 Adjustment of wheel bearing end play
  • 33-310 Removal and installation of front wheel hub
  • 33-320 Disassembly, inspection, repair and assembly of front wheel hub
  • Steering knuckle
  • 33-400 Removal and installation of steering knuckle
  • 33-410 Checking steering knuckle
  • 33-420 Removal and installation of steering knuckle arm
  • Steering knuckle bearing
  • 33-425 Checking supporting and guide joint of steering knuckle bearing
  • 33-430 Replacement of sleeves for supporting and guide joint of steering knuckle bearings
  • 33-440 Replacement of supporting joint for steering knuckle bearing
  • Control arm
  • 33-500 Removal and installation of upper control arm
  • 33-512 Removal, disassembly, assembly and installation of lower control arm
  • 33-515 Removal and installation of brake support
  • 33-520 Reconditioning bearing of lower control arm
  • 33-540 Supporting joint and supporting tube of brake support
  • 33-550 Checking and repairing bearing of upper control arm
  • 33-560 Checking upper control arm
  • 33-570 Checking lower control arm

35 Rear axle

  • Rear axle
  • 35-010 Removal and installation of complete rear axle
  • 35-040 Removal and installation of front rubber bearing of rear axle suspension
  • 35-050 Removal and installation of rear rubber bearing of rear axle suspension
  • Semi-trailing arm
  • 35-110 Removal and installation of semi-trailing arm, replacement of rubber bearings
  • 35-130 Removal and installation of rear axle shaft flange, adjustment of bearings
  • Coupled semi-trailing arm
  • 35-310 Removal and installation of coupled semi-trailing arm, replacement of rubber bearing
  • 35-330 Removal and installation of link between coupled semi-trailing arm and caliper carrier
  • 35-350 Disassembly, assembly and adjustment of wheel carrier
  • 35-360 Removal and installation of caliper carrier and rear axle shaft flange, adjustment of wheel bearing
  • Inspection of wheel location
  • 35-410 Complete inspection of rear axle directional stability
  • 35-420 Checking semi-trailing arms
  • 35-430 Checkup of rear axle carrier
  • Rear axle center piece
  • 35-500 Differentiating characteristics, installation survey for rear axle center piece
  • 35-520 Removal and installation of rear axle center piece with rear axle shafts
  • 35-530 Replacement of radial sealing ring on drive pinion
  • 35-540 Replacement of radial sealing of rear axle shaft
  • 35-550 Disassembly and assembly of rear axle center piece, adjustment of gear assembly
  • 35-560 Reconditioning of differential
  • Rear axle shaft
  • 35-620 Removal and installation of rear axle shaft
  • 35-660 Exchanging rubber sleeves on rear axle shaft
  • 35-680 Removal and installation of ring-shaped weight on inner joints of rear axle shafts

40 Wheels

  • Wheels
  • 40-010 Lifting vehicle with vehicle jack
  • 40-013 Positioning of jacking-up shoes and jacks
  • 40-100 Survey rims and tires
  • 40-102 Rims
  • 40-104 Tires
  • 40-106 Tire inflation pressure
  • 40-108 Snow chains
  • 40-110 Removing and mounting of wheels
  • 40-111 Removing and mounting of wheel covers
  • 40-112 Removal and installation of holding spring or annular spring for wheel covers
  • 40-113 Removing and mounting hub cap for forged light alloy rims

41 Propeller shaft

  • Removal and installation
  • 41-050 Removal and installation of propeller shaft
  • Reconditioning
  • 41-100 Removal and installation of propeller shaft intermediate bearing, replacement of radial ball bearing
  • 41-200 Replacement of centering sleeve

42 Brakes, hydraulic and mechanical system

  • Brake system
  • 42-010 Bleeding the brake system or renewing the brake fluid
  • 42-012 Checking brake lines and brake hoses
  • 42-015 Checking the brake system for leaks
  • 42-035 Checking warning device in expansion tank
  • 42-040 Inspection or adjustment of mechanical brake light switch
  • Brake caliper
  • 42-100 Removal and installation of caliper on front axle
  • 42-120 Removal and installation of caliper on rear axle
  • 42-140 Checking piston release clearance in caliper
  • 42-150 Replacement of piston seal on front axle caliper
  • 42-155 Replacement of piston seal on rear axle caliper
  • 42-160 Replacement of brake pads
  • Brake disc
  • 42-220 Removal and installation of brake disc on front axle
  • 42-228 Removal and installation of brake disc on rear axle
  • 42-260 Cleaning of brake discs
  • Stepped tandem main cylinder
  • 42-310 Removal and installation of tandem main cylinder
  • 42-315 Disassembly, inspection and assembly of stepped tandem main cylinder
  • Parking brake
  • 42-510 Removal and installation of parking brake pedal system
  • 42-515 Replacement of rubber stop in pedal system of parking brake
  • 42-520 Removal and installation of front brake cable control
  • 42-525 Removal and installation of rear brake cable control
  • 42-530 Removal and installation of brake shoes of parking brake
  • 42-540 Readjustment or adjustment of brake shoes of parking brake

43 Brakes, pneumatic system

  • Brake booster
  • 43-023 Testing check valve
  • 43-325 Checking brake booster
  • 43-350 Removal and installation of brake booster
  • Vacuum pump
  • 43-610 Removal and installation of single diaphragm vacuum pump
  • 43-615 Removal and installation of double diaphragm vacuum pump
  • 43-618 Removal and installation of piston vacuum pump
  • 43-620 Replacing diaphragm and plate valves of single diaphragm vacuum pump
  • 43-625 Replacing diaphragm and plate valves of double diaphragm vacuum pump
  • 43-628 Replacing piston seal and plate valves of piston vacuum pump
  • 43-630 Replacing rocker arm of single diaphragm vacuum pump
  • 43-635 Renewing rocker arm of piston vacuum pump
  • 43-660 Checking single diaphragm, double diaphragm and piston vacuum pump

46 Steering

  • Steering
  • 46-010 Differentiating characteristics of steering gears
  • 46-070 Reconditioning of steering gear
  • Checking of steering
  • 46-110 Checking play of steering components
  • 46-120 Checking start of manual restriction
  • 46-130 Checking oil pressure of power steering pump
  • Manual steering 760.1 (L 1 Z)
  • 46-220 Reconditioning of steering gear
  • Power steering
  • 46-310 Removal and installation of manual steering
  • Manual steering 765.7 (LS 90)
  • 46-412 Removal and installation of power steering
  • 46-480 Adjustment of power steering in vehicle
  • Steering linkage and steering control arms
  • 46-510 Removal and installation of pitman arm
  • 46-520 Removal and installation of intermediate steering arm
  • 46-540 Removal and installation of track rod
  • 46-550 Removal and installation of drag link
  • Steering wheel, jacket tube, steering shaft, steering lock
  • 46-610 Removal and installation of steering wheel
  • 46-620 Removal and installation of jacket tube
  • 46-625 Disassembly and assembly of jacket tube
  • 46-630 Removal and installation of steering shaft
  • 46-640 Removal and installation of steering lock
  • Power steering pump
  • 46-700 Differentiating characteristics of power steering pump
  • 46-705 Renewing radial sealing ring of power steering pump
  • 46-710 Removal and installation of power steering pump
  • 46-720 Disassembly, checkup and reconditioning of power steering pump
  • 46-740 Assembly of power steering pump
  • 46-760 Removal and installation of mounting bracket for power steering pump