Car troubleshooting Mercedes E-Class (W124)

Engine Diagnostics and Troubleshooting
The engine crankshaft does not rotate or rotates very slowly when the engine is started by the starter Insecure battery terminal connections. Discharged or defective...

Diagnosing and Troubleshooting the Cooling System
Engine overheating Insufficient fluid level in the cooling system. The thermostat is not working. Clogged internal cavities of the radiator. Faulty radiator fan or...

Diagnostics of malfunctions of fuel and exhaust system
Increased fuel consumption The air filter element is dirty. Low pressure in car tires. On models with gasoline engines with a carburetor, the throttle mechanism is...

Clutch Diagnostics and Troubleshooting
Clutch pedal is easy to push or fall through Low fluid level in the hydraulic clutch system. Damaged release bearing or clutch release fork. Clutch pressure plate...

Diagnostics of malfunctions of a manual transmission
Noise when driving with the gear lever in neutral Wear of gearbox input shaft bearings (noise goes away when clutch pedal is depressed). Release bearing wear (The noise...

Diagnostics of malfunctions of an automatic transmission
Attention! Due to the fact that the gearbox is a very complex unit, it is therefore difficult to diagnose and repair a malfunction in the gearbox. Do not remove the...

Diagnosis of malfunctions of the differential and cardan shaft
Vibration when accelerating or decelerating The universal joint of the cardan shaft is worn out. The propeller shaft is out of balance. Noise that increases with...

Diagnostics and troubleshooting of the brake system
Attention! Check front wheel alignment, tire condition, and tire pressure before diagnosing a problem with the brake system. If there are malfunctions in the anti-lock...

Suspension and steering fault diagnosis
Attention! Before diagnosing a suspension or steering problem, check the tire pressure, the absence of wheel braking, and that the tires are the same on the vehicle. Car...

Diagnostics of malfunctions of electrical equipment
The battery holds a charge for a short time Battery failure due to shedding of plates. Battery terminals loose or corroded. Auxiliary drive belt worn or incorrectly...