With a Haynes manual, you can do it yourself...from simple maintenance to basic repairs. Haynes writes every book based on a complete teardown of the vehicle. We learn the best ways to do a job and that makes it quicker, easier and cheaper for you. Our books have clear instructions and plenty of photographs that show each step. Whether you're a beginner or a pro, you can save big with Haynes!- Step-by-step procedures - Easy-to-follow photos - Complete troubleshooting section - Valuable short cuts - Color spark plug diagnosis Complete coverage for your Mercedes-Benz Diesel 123 Series covering all 200D 220D, 240D, 240TD, 300D, 300CD, 300TD models, designated W123 Series 4-cyl & 5-cyl including turbo-diesel (1976 thru 1985): - Routine Maintenance - Tune-up procedures - Engine repair - Cooling and heating - Air Conditioning - Fuel and exhaust - Emissions control - Ignition - Brakes - Suspension and steering - Electrical systems - Wiring diagrams