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ABS and ESP control units: Function, diagnosis and repair instructions Important safety note The following technical information and practical tips have been compiled by HELLA in order to provide professional support to vehicle workshops in their day-to-d

Check ignition coil: Step-by-step guide to successful diagnosis The ignition coil generates the high voltage required to ignite the fuel/air mixture in gasoline engines. On this page you can find out how ignition coils work and which designs are used in th

Defective cornering light: Recognising symptoms and checking them properly The bend lighting extends the visual range on curved roads or when cornering. The course of the road and obstacles can be identified earlier and more easily in darkness. In addition

Headlights explained in simple terms – function, types and regulations Vehicle headlamps focus the light beams generated by the light source onto the road. On this page, find out about the structure of headlamps, and what lighting technology concepts and l

E-mobility in everyday workshop activities: new technology, safety requirements and opportunities for specialised companies Key facts at a glance E-mobility is changing everyday workshop activities: new technologies, high-voltage systems and networked com

Damage patterns on starters – recognising causes, avoiding failures The starter, also known as the starter motor, is one of the central components in the starting and charging system. A failure can have all kinds of consequences: ranging from starting diff

Throttle valve switch: Function, fault symptoms and testing instructions The throttle valve switch informs the engine control unit about the throttle valve position so that the mixture and ignition can be adjusted to suit the respective load. This page exp

How workshops can test, replace and adjust NOx sensors at Mercedes-Benz If a fault is diagnosed with the NOx sensor when troubleshooting an exhaust gas purification system, this can present a challenge for a workshop. Because of the complexity of the compo

Tyre pressure monitoring system (TPMS): How it works, differences between systems and important practical tips From the end of 2014, all new vehicles have a tyre pressure monitoring system on board as standard. It provides a warning about insufficient tyre

Everything about brake lines and handbrake cables: Identifying and repairing damage Brake lines, brake hoses, and hand-brake cables all have one thing in common: They transfer the actuation force to the wheel brakes either hydraulically or mechanically. Th