Wednesday 27th October 2021

What actually is the test bench mode / roller mode?

Reading time 5 Min. Find us on TikTok tuning blog 1 What is the test bench mode / roller mode? de Was ist eigentlich der Prüfstandmodus / Rollenmodus? Deutsch

BILSTEIN Supra test stand 3 What actually is test stand mode / roller mode?

Not all vehicles have a so-called Test stand mode / roller mode. This is a special mode for the test bench power measurement but also for that Brake test. For example, if you go with a BMW vehicle X Drive four-wheel drive off, then disabled in some cases the roller mode the all-wheel drive on the front axle. That means only the rear axles are still driven. In addition, all electronic helpers such as traction control or ESP are complete disabled. In this mode, a power measurement is usually possible and can be done without any problems none automatic controls with regard to drive / power on the part of the vehicle are made. So is a unadulterated test result actionable. In vehicles from BMW, the role mode is often via a secret menu activated. As an example of the BMW F30 335i. With this vehicle, you press the button for resetting the trip meter for a long time and this brings you to the special menu.

More about this in the following video!

The names also differ depending on the vehicle. Older model series from Mercedes-Benz refer to the option as "Roller test". But the principle is the same. Here too disabled the mode the ESP and traction control completely. The way in which you get into the menu is different depending on the vehicle. Another example based on a Mercedes C-Class of the W 203 series:

  • Radio off
  • Set the display to the output menu
  • remove key
  • Insert the key
  • set to level 1
  • Press the button 3 times to delete the trip meter / consumption etc.
  • a tone sounds
  • Stage 2 (ignition)
  • Menu is active
  • then on "Roller dynamometer ESP - a" place
  • the measurement can begin

also for the brake test bench

Brake test stand Roller test stand e1631163345217 What actually is the test stand mode / roller mode?

Activate from Roller dynamometer test is also necessary for many vehicles when driving on a brake test bench. Errors in the control unit are avoided here and the wheel sensors are not affected. Because the brake test on a conventional roller dynamometer that is not suitable for all-wheel drive carries the risk that it will tension comes and possibly also to overuse of the drive train. This is because the braking forces are then transferred, so that the test value can be falsified. One Misdiagnosis in terms of braking performance is the result.

Why is the mode actually necessary?

Vehicle dynamics control ESP electronic stability program Symbol 3 e1626767999673 What actually is the test stand mode / roller mode?

Mainly it's about Error in the control unit during the brake test and around tension. If you do not activate the mode, you run the risk of the wheel sensors or the ABS unit becoming defective. One scenario is, for example, that one axle rotates and the other does not, the electronics think, that the stationary wheels may block and the ABS then tries to get this "blocking" of the wheels under control by intervening.

Inform the testing organization of the mode

Many testing organizations as well as workshops either do not know the mode, or they are simply “too lazy” to activate it. In the course of the main inspection, the tester should therefore be informed about the dyno mode / roller mode for the brake test to activatein order to obtain a good measurement result and to protect the vehicle technology.

TUeV general inspection control HU AU What is the test bench mode / roller mode?

Alternative to the role mode menu

any Alternatively, if the menu cannot be activated or simply no way into the secret menu is known, you can also drag the corresponding ESP / ASR protection be. Depending on the vehicle, this can lead to various error messages. Some vehicles (especially older ones) can be measured in this way without any problems. Furthermore, it may well be possible that the mode only has a corresponding diagnostic device can be activated.

summary information

Since the various manufacturers of all-wheel drive vehicles also use different concepts for power distribution, it is possible to no blanket statement determine which vehicle can be measured under which conditions on a roller brake tester not designed for all-wheel drive vehicles. If the vehicle has such a special mode and this is not used, then in most cases the brake tester is switched off or the vehicle is pushed out of the roller set. However, if this does not happen, i.e. the test bench does not switch off, then overload / tension in the drive train can occur, which can result in expensive repairs. Tip: All-wheel drive vehicles should be driven out of the test bench with stationary rollers in order to avoid unnecessary wear and tear.

We hope that you have received our information report on the topic / term Role mode (Further designations / keywords are: Drive test, brake test bench mode, brake test mode, power measurement mode, power test bench mode, test bench mode, test bench mode, roller operation, roller test stand mode, roller test) from the Autotuning category. Our goal is to have the largest German-speaking tuning lexicon (Tuning Wikipedia) and to explain tuning technical terms from A to Z easily and understandably. We are therefore expanding this lexicon almost daily and you can see how far we have already come HERE see. And soon the next one will be Tuning scene concept illuminated by us. There's a theme that should not can be found in our Wikipedia? Then send us an email at and gives us the term. We will write a suitable article as soon as possible. PS. By the way, you will be informed about new topics if you have ours Feed subscriber.

Performance test bench VW Kaefer Dyno performance measurement What is the test bench mode / roller mode?

Below are a few examples from our tuning lexicon:

But of course tuningblog has countless other articles on the subject of cars & car tuning in stock. Do you want to see them all? Just click HERE and look around. We would also like to provide you with news aside from the tuning. In our category Tips, products, information & Co we pick up contributions from car or accessory manufacturers. And also our category Test sites, laws, offenses, information has almost daily new information for you. Here are a few topics from our tuning wiki:

Lowering for vehicles with leaf springs, parabolic springs, etc.?

Fiat 500 Topolino lowering leaf springs 310x165 What is the test bench mode / roller mode?

Rear window heating simply repaired with conductive silver!

Rear window heating defective repair conductive silver 310x165 What actually is the test bench mode / roller mode?

BimmerLink: fault detection for BMW, Mini and the Supra!

Bimmerlink Bimmercode BMW Mini Toyota Experience 310x165 What actually is the test bench mode / roller mode?

"" - we keep you up to date on the subject of car tuning and car styling with our tuning magazine and we present you the latest tuned vehicles from all over the world every day. It's best to subscribe to ours Feed and will automatically be informed as soon as there is something new about this post, and of course also to all other contributions.


Smava tuning blog credit 12 e1618563898711 What is actually the test stand mode / roller mode?

Leave a Comment

Your e-mail address will not be published.