Car horn replacement

Useful information and valuable tips regarding the replacement of horns, with the Audi TT/RS and Grand Cherokee serving as examples

Depending on the field of application and on the operating conditions, the horn mounted onboard, also known as a klaxon, can have too weak a sound. In such cases it is useful to install a more powerful horn in order to be able to produce an adequate warning sound in the event of a dangerous situation. How to implement this modification and which points have to be considered in the process can be found on this website using Audi TT/RS and a Grand Cherokee jeep as examples.

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Diagnosing brake problems

Useful and valuable repair tips regarding damage assessment on brake discs, brake pads as well as wheel suspension and steering

Damaged or improperly function components in the wheel suspension or steering can affect not just the driving characteristics but the braking characteristics of the vehicle as well. If unusual noises, vibrations or unstable driving characteristics are detected during braking, the potential cause can stem from different vehicle components.

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Headlight adjustment

Useful information and handy tips relating to the adjustment of vehicle headlamps

On this page find out what requirements must be met for the correct headlamp adjustment, and how both classic and modern lighting systems can be tested.

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Mercedes Benz

Engine power loss

On vehicles with OM 629 engines, the possibility exists that there is a loss of engine power. The reason for this may be an electrical interruption in the crankshaft sensor.

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Volkswagen Golf 4

Motor dies shortly after starting

The above vehicles can experience the engine dying shortly after it has started. This could be caused by a malfunction of the immobiliser.

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Alfa Romeo Model 147

Engine will not start

If a customer complains about the above problem, this could be caused by a defective crankshaft sensor. The vehicle cannot be started sporadically, irrespective of whether the engine is warm or cold.

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Ford Galaxy

Airbag SRS – Hazard warning lamp lights up

If the SRS hazard warning lamp lights up during driving in the above vehicles, one possible cause may be a wrong adjustment of the brake pedal switch.

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VW Golf 6 Plus

Poor acceleration performance

If the defect described above occurs together with the listed error codes, a possible cause may be a defective plug connection of the accelerator pedal sensor.

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Volvo V60

Vehicle has no power

If the fault symptoms described above occur together with error code P0299, a possible cause may be a faulty charge air radiator hose.

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Volkswagen Golf VI

Functional defect of cabin fan during low outside temperatures

Should the vehicles mentioned above experience a defect of the cabin fan, the possible cause might be frozen water inside the fan enclosure.

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Audi A4/A5/A6/A7/Q5/Q7/TT

Loss of power in heating/air-conditioning systems

Should the vehicles mentioned above experience a loss of heating and/or air-conditioning power, water entry into the wiring harness may be the cause.

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Mercedes Benz G-Class

Poor braking function of rear-wheel brake

If the problem mentioned above is detected, this may be due to a torn rear axle brake caliper. In worst case scenario, the rear-wheel brake might fail.

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Adaptive Cruise Control

Adjusting ACC sensor

Here you will find useful knowledge and important tips regarding the topic of Adaptive Cruise Control (ACC) and/or automatic ACC distance control as well as the calibration of ACC radar sensors.

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Overview of driver assistance systems

Useful information on driver assistance systems - in glossary format

The following overview, appearing in alphabetical order, lists the most common driver assistance systems including short descriptions for each one.

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Audi Q5

Noise from air-conditioning line

The vehicles mentioned above may experience clattering noise coming from the engine compartment. If this happens, special attention should be paid to the lines of the air-conditioning system.

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Ford Galaxy and S-Max

Failure of front headlamps

On the vehicles mentioned above, customers have complained that the front headlamps fail while driving. The reason for this problem is faulty software for the headlamp module.

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BMW 7 Series E 65/66

Front and rear axle brake system squeals when applying light braking force

If the above fault occurs, it may be associated with the brake lining wear indicator.

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Citroen C5/C6/C8/Crosser

Starting behaviour and engine performance are inadequate, and the engine control light comes on

In this case, the fuel filter may be clogged. The cause may be the formation of a muddy mass due to the use of fuel additive Eolys 176.

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High-Carbon Brake Discs

Ahead of the curve

Our product range has been expanded to include high-carbon brake discs – an impressive addition that will ensure our recipe for success is upholded.

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K-LED Blizzard

Very high warning effectiveness, Modern design, Flashing light function

The K-LED Blizzard is the successor generation to the popular and widespread K-LED FO. These can be replaced like-for-like. The new generation combines its predecessor's popular design with the latest LED technology.

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Brake calipers

Core-free new parts

FEATURES & BENEFITS. All products undergo a 100% final inspection after production is complete. Core-free new parts. Easy handling thanks to dispensing with core deposit processing. No capital tied up with core deposits.

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Volvo XC 90 II

Temperature control of air-conditioning system

You can always depend on wiper blades from HELLA. The rubber lips of the blades are coated with graphite so that they can be subjected to the most intense of loads on a continual basis, and the design minimises aggravating wind noise.

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Which bulb is the right one?

Our bulb configuration tool helps you to quickly and easily find the right bulb

A few clicks will take you to the right bulb. Simply by specifying the appropriate vehicle and model you can hone in on the products we offer for that particular car. Of course we don’t just offer product data, but also additional information for the various light bulbs and their technology.

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"Starting aid" repair notes

Jump starting using jumper cables

If the starting speed of a motor vehicle is not sufficient to start the engine due to a weak battery, the vehicle can be started externally using an external battery and jumper cables.

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Specific vehicle repair information


Vehicle-specific diagnostic and repair information relating to a variety of fault symptoms.

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HELLA online training


Take advantage of the HELLA online training to refresh and expand your knowledge. Learn about the HELLA core competency areas at your own pace.

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Campaigns and special offers


Here you will find an overview of the current campaigns and special offers from HELLA.

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Online product catalogue


Quick, clear and efficient – Find the right HELLA Product!

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New products


Here you can find all information about new products, product ranges and extensions from HELLA. 

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