Each Haynes manual is written for the do-it-yourselfer and provides step-by-step instructions based on a complete disassembly of the vehicle. This hands-on experience provides the reader with specific and detailed instructions for performing everything from basic maintenance and troubleshooting to a complete engine overhaul. The models and model years covered in this title are as follows: Mercedes-Benz Diesel 123 Series for 200D, 220D, 240D, 240TD, 300D, 300CD, 300TD models, designated W123 Series 4-cyl 5-cyl inc. turbo-diesel (1976-1985) This Haynes automotive repair manual includes 700+ photos and the following chapters: Introduction Chapter 1: Routine Maintenance Chapter 2: Part A: Engine Chapter 2: Part B: General engine overhaul procedures Chapter 3: Cooling, heating and air conditioning systems Chapter 4: Part A: Fuel and exhaust systems Chapter 4: Part B: Turbocharger Chapter 5: Engine electrical systems Chapter 6: Emissions control systems Chapter 7: Manual and automatic transmission Chapter 8: Clutch and driveline Chapter 9: Brakes Chapter 10: Suspension and steering systems Chapter 11: Body Chapter 12: Chassis electrical system Wiring Diagrams