7g tronic

Mercedes-Benz has renamed and revamped a number of its vehicles over the course of the past year, and that will continue into the model year with models like the new Mercedes-Benz SLC.

As an evolution of the 7G-TRONIC 7-speed automatic transmission found in most previous generation models, the new 9-speed version helps boost efficiency and performance. As the first nine-speed automatic transmission in the premium vehicle category to feature a hydrodynamic torque converter, which transfers torque using fluid rather than a mechanical clutch, Mercedes-Benz is once again at the cutting-edge of the automotive world.

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The result? While economic and dynamic are largely self-explanatory, manual puts the power in the hands of drivers, as shifts can be made using steering-wheel-mounted paddle shifters.

Efficiency gains come from the wide gear ratios and the lightweight construction of the transmission itself. Despite the two additional gears, Mercedes-Benz engineers managed to install it in the same space in which its 7-speed predecessor was housed. The wide-range of gears also allows for lower revs, which helps increase efficiency, especially in highway driving.

In terms of performance, the 9G-TRONIC 9-speed automatic transmission is capable of skipping individual gears when downshifting, providing quicker accelerations and faster sprints. Currently, the new Mercedes-Benz 9G-TRONIC 9-speed automatic transmission is available in all the recently refreshed utility vehicles, and it will continue to make its way into more Mercedes-Benz models as they get refreshed and redesigned in the coming years.

In the meantime, take a closer look at these utility vehicles equipped with the new transmission. You can follow any responses to this entry through the RSS 2. You can skip to the end and leave a response. Pinging is currently not allowed. I just picked up my S convertible two days ago. The transmission stopped working after 77 miles, the car went into limp home mode, not responding to the accelerator and driving at 12 miles per hour.

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Just for comparison, my Ford Pinto wentmiles before a transmission failure. So far, no diagnosis by my dealer. Ask me if I am happy.


You bought a mercedes. Everyone knows this. I just got a Mercedes Benz E and I have had no problems with the car and the 9 speed transmission is amazing. It has made the car faster and more fuel efficient. I have a car Mercedes metris year. At 76, miles.SL65 AMG. Throughout the production cycle of the The blue fluid is the lowest viscosity fluid offered on the The rear of the transmission doubles as the transfer case, and in the event of a transfer case failure, it's not sold separately.

An additional benefit of using the updated filter is if you replace a damaged component in the transmission and you find significant debris in the pan, you will no longer need to replace the entire transmission. You can simply replace the component, clean the valves, and perform a fluid and filter change. Diagram Parts List.

An added benefit of installing the updated components is the additional fluid holding capacity of the newer pan. If you have any questions or comments, or feel there's anything that should be added to this guide, feel free to leave them in the comments below.

There was a time when the engineers at Porsche were commissioned to build a W Mercedes-Benz. This factory widebodied, V8 powered E was the result Read More.

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The differential is an often overlooked component on vehicles that requires regular maintenance. Something as simple as regular fluid flushes can keep your differential functioning optimally for the If you're finding oil spots underneath your Mercedes-Benz, don't panic—it's probably not from your valve covers or oil pan. It's most likely your oil cooler gasket that is extremely easy to replace.

The power steering fluid reservoir on Mercedes-Benz models with the M, M, and MK engines feature an integrated filter. Over time, this filter can become clogged and cause problems with your It distributes hot or cold air through the ventilation system of your car. If you're experiencing There's a lot to consider after graduation—where you're going to work, where you're going to live, what your friends are up to, and much, much more.

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This is exacerbated by the heavy use of Written by : Kyle Bascombe. Previous Comments. More Related Articles.V12 engine models continue to use the older Mercedes-Benz 7G-Tronic transmission. By the end of unsurpassed ratio span among longitudinal automatic transmissions for passenger cars. It is also fabricated by Jatco for use in Nissan and Infiniti vehicles.

With 9 forward gears plus 1 reverse, the transmission meets all requirements. Achieving this with only 10 major components 4 simple planetary gear sets3 brakes and 3 clutch [5]reflects how advanced the concept is. These ordinates are positioned on the abscissa in strict accordance with the proportions of the sun gears' teeth numbers relative to those of their rings. Consequently, the output ratios on the 3rd ordinate carrier of the third planetary gearset follows closely those of the actual transmission.

This advantageous geometric construction sets us free from Willis' famous and tedious formula, because all calculations are exclusively determined by lengths ratios, respectively teeth numbers on the abscissa for the 4 epicyclic ratios, and of rotational speeds on the 3rd ordinate for the 10 gear ratios.

From Wikipedia, the free encyclopedia. Retrieved Retrieved 22 July International Mercedes-Benz World. Cars portal. Namespaces Article Talk. Views Read Edit View history. By using this site, you agree to the Terms of Use and Privacy Policy. Mercedes-Benz 7G-Tronic transmission.This fifth-generation transmission was introduced in the Autumn of on 8-cylinder models, and was the first seven-speed automatic transmission ever used on a production vehicle. Since then, it has been applied to all eight-cylinder Mercedes-Benz models.

It is also available on some six-cylinder models including the new CDI engines which uses a VTG turbo charged common rail diesel engine. The company claims that the 7G-Tronic can save up to 0.

The 7G-Tronic has two reverse gear ratios: 3.

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The winter mode, also recently named 'comfort' mode, starts out in 2nd forward and 2nd reverse. The transmission can skip gears when downshifting, allowing for quicker acceleration. It also has a lockup torque converter on all seven gears, allowing better transmission of torque for improved acceleration.

The transmission's case is made of magnesium, a first for the industry, to save weight. The 7G-Tronic is the fifth-generation transmission for Mercedes-Benz. The automaker has produced over eleven million automatic transmissions since About 65 percent of Mercedes-Benz C-Class sedans, wagons, and sport coupes are purchased with automatic transmissions with that figure rising.

However, about 88 percent of Mercedes-Benz E-Class sedans and wagons are purchased with automatic transmissions, and automatic transmissions are standard on the Mercedes-Benz S-Class. A newer version of the 7G-Tronic which is coupled to a mechanical clutch instead of a torque converter, thereby enhancing shift speed and fuel economy. Sign In Don't have an account? Start a Wiki.

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Contents [ show ]. Categories :. Cancel Save.Product Portfolio Comprehensive information about our full Product Portfolio can also be found at our Internet Portal. Email: customer. Image no. This brochure is intended as a tool to answer any questions you may have and to help you in your dayto-day work on transmission The function descriptions are structured in a familiar way but also contain explanations of customer experiences which will help you to explain the background to the functions to the customer.

All the technical data and remedies listed in this brochure are valid as of the copy deadline in July Before performing a repair, confirm and, if necessary, modify the procedure described in this document by comparing it to the currently valid documents in WIS for your market. This brochure is also intended to help you diagnose and repair technical problems and to explain the interrelationships between problems and remedies. Function and design Transmission An understanding of the function and technology of the transmission will allow you to explain customer experiences more easily.

This will prevent the customer from having to wait while an enquiry is processed by the technical workshop support team. A complete function description of transmission Transmission The following start-off gear strategy currently applies for MB passenger cars does not apply to AMG :. A shift line displacement takes place when the control unit logic changes the shift points so that an upshift to the next gear up does not take place at the time expected by the customer but "later" i.

A shift line displacement can be triggered by the following factors: Change in driving resistance e. This function is only active in S-mode. Requests from other control units e. S-mode, vehicle always starts off in 1st gear C-mode diesel engine, 1st gear C-mode gasoline engine, 2nd gear Offroad vehicles in high-range, 1st gear Offroad vehicles in low-range, 2nd gear. These factors can also cause the transmission to downshift "earlier" to the next gear down during deceleration i.

Functions from customer perspective Customer statement "Transmission stopped shifting". The intelligent servo module ISM and gearshift lever are part of a shift-by-wire system. The shift pulses for changing the gear range P, R, N, D are transferred to the ISM as electrical signals where they are implemented after a plausibility check.

There is a malfunction in the transmission. This does not necessarily mean that the transmission is defective.

7g tronic

The malfunction may also have been caused by missing CAN signals. The transmission fault codes as well as the engine and ESP fault codes must always be processed in this case.

7g tronic

Shift line displacement has taken place. The customer may perceive a shift line displacement as a failure to shift if, for example, the shift line has been displaced significantly and the customer is reluctant to accelerate any further. The vehicle does not switch to 7th gear under full load because the " full load" shift point cannot be reached.

This predominantly occurs on vehicles with less powerful engines. On road surfaces with a slight incline or on flat road surfaces, the maximum speed may be reached under full load in 6th gear before the shift rpm is reached.

The transmission only shifts to 7th gear when the accelerator pedal is released or when the vehicle can accelerate further due to a reduction in driving resistance downhill slope.

If a system fault occurs, the driver is notified of this by means of a display message. The driver should then drive to the next workshop without changing gear range, if possible. The next time the driver attempts to change gear range, it is possible that only "P" will be able to be engaged in the ISM by means of an emergency mechanism. It would then no longer be possible to continue driving the vehicle.

This does not necessarily mean that a component of the system is defective.September 20, — Mercedes-Benz The The plaintiffs claim Mercedes has known about the transmission problems based on technical service bulletins TSBs sent to dealerships. The problems have allegedly been so severe that at one point Mercedes was unable to keep up with orders for replacement Additionally, the lawsuit alleges Mercedes blocked independent repair facilities from buying replacement parts.

Benz 722.9 7G gearbox coding with Star Diagnosis

Owners complain about the dangers of driving when the transmissions enter limp mode. There is a systemic problem with the Mercedes Benz 7G tronic The owner also mentioned the same problem as mentioned in the lawsuit concerning independent repair shops unable to get parts. The failed valve body or conductor plate allegedly causes serious safety issues as the transmission tries to shift from first to second or higher gears while driving.

The vehicle will enter limp mode no matter what speed the vehicle is traveling, causing drivers and others on the highway to cope with the sudden hazards. Despite this, the automaker has allegedly failed to take action to protect customers and fix the transmissions, especially when failures occur outside the warranty periods. Owners also claim they are stuck paying huge bills to replace the 7G-Tronic transmissions when Mercedes should be responsible for the alleged defects. One of the plaintiffs says his vehicle suffered from transmission failure and he was stuck with the bill.

Months later Hamm noticed the car would occasionally go into limp mode wherein the car got stuck in a low gear and wouldn't accelerate. The plaintiff says he took the vehicle to a mechanic who said the problem would be tough to diagnose because it happened sporadically. Hamm claims the vehicle continued to enter limp mode every six months, but by the problem got worse and the engine light illuminated. Hamm then brought his vehicle to a repair shop that said the Hamm claims he repeatedly asked for help from Mercedes and its dealers but was refused at every corner because the warranty expired.

According to the class-action lawsuit, the The lawsuit alleges this shows the automaker had five years to admit the transmissions were defective.

7g tronic

The Mercedes-Benz Owners claim TSB Guide How these simple documents can unlock information about your car. Read Our Guide.This fifth-generation transmission was the first seven-speed automatic transmission ever used on a production passenger vehicle.

It also soon became available on many six-cylinder models.

Mercedes-Benz 5G-Tronic transmission

Turbocharged V12 engines, four cylinder applications and commercial vehicles continued to use the older Mercedes-Benz 5G-Tronic transmission for many years. The company claims that the 7G-Tronic is more fuel efficient and has shorter acceleration times and quicker intermediate sprints than the outgoing 5-speed automatic transmission. The transmission can skip gears when downshifting. It also has a lockup torque converter on all seven gears, allowing better transmission of torque for improved acceleration.

The transmission's casing is made of magnesium alloya first for the industry, to save weight. In JulyMercedes-Benz announced they are working on a new nine-speed automatic. It uses no bands nor sprag clutches [4]. Turn out the design as advanced compared to its predecessor but less economical compared to its competitors. In normal condition it sequentially shift gears, but if required can skip some gears, that are: 7 to 5, 6 to 2, 5 to 3 and 3 to 1.

For 6 or 8 cylinder gasoline engines and if Sport mode is not selected, transmission will start in 2nd gear. Also, if it is a Off road vehicle, if Low range is selected, will start in 2nd gear too. If emergency mode is activated, like when occurs an electric fault or another critical fault, 6th gear default is selected all solenoids off. It is a fully electronic controlled unit. Torque converter lock up can operate in all 7 forward gears. Sporty, performance-oriented version with the same gear ratios.

Instead of a torque converter, it uses a compact wet startup clutch to launch the car from a stop, and also supports computer-controlled double declutching.

Mercedes-Benz 7G-Tronic transmission

The driver can change gears either using the selector lever, or by nudging the steering-wheel shift paddles. The new Race start Function is a launch control system which enables the driver to call on maximum acceleration, while ensuring optimum traction of the driven wheels. Improved with the release of the model year, by decreasing lag time between shifts. From Wikipedia, the free encyclopedia. DaimlerChrysler press release.