Mercedes 7g tronic problems

The Mercedes-Benz 5G-Tronic automatic transmission, also known as a It is fitted to a number of vehicles within the Mercedes-Benz range, as well as some Jeep, Jaguar, and Ssangyong models.

mercedes 7g tronic problems

See the bottom of the page for a list of vehicles this transmission is fitted in. The seals around the connector harness of the The fix for the leak itself is relatively simple, requiring a replacement harness. If you notice your The Replacement electrics packs can be fitted. The valve that controls the torque converter lockup in the The valve itself can be reamed and replaced, fixing the problem.

In some cases, a replacement torque converter may also need to be fitted. The biggest problem faced by owners of a vehicle running a This usually occurs when the transmission has run somewhere in the region of 80, miles since new or since the last time it was overhauledand will require a full overhaul to repair.

On vehicles where the transmission cooler is built into the standard engine radiator, it is quite common for the pipes to corrode, allowing engine coolant to contaminate the transmission fluid. The ingredients of the engine coolant break down essential materials inside the transmission, exponentially accelerating wear of the clutches and causing the transmission to fail.

If you have a vehicle with a This list should be used as a guide only, there may be exceptions cross-over models, for example where a vehicle on this list is not running a Oil Leak The seals around the connector harness of the Faulty Electrics Pack The Torque Converter Lockup Valve The valve that controls the torque converter lockup in the Wear and Tear The biggest problem faced by owners of a vehicle running a Water Contamination On vehicles where the transmission cooler is built into the standard engine radiator, it is quite common for the pipes to corrode, allowing engine coolant to contaminate the transmission fluid.

Vehicles Running the However much like the previous seven speed conductor plate, the 7G Tronic Plus still comes with its fair share of problems. Commonly when the 7G Tronic Plus conductor plate fails it will cause gears to stick before instigating a harsh gear adjustment causing rough and jerky gear change.

Failure of the 7G Tronic Plus conductor plate will also completely prevent selection of any gear, leaving the vehicle undriveable. When looking at diagnosing the vehicle for these issues be sure to scan and read fault codes from the transmission, if faulty the 7G Tronic Plus conductor plate will log fault codes for internal speed sensor issues.

All of these faults usually begin intermittently but will always worsen into a more permanent state if left unresolved. Rather than an expensive replacement from manufacturer, which will need SCN Software Calibration Numbering and CVN Calibration Verification Number coding at an extra expense, we offer test and rebuild of your original conductor plate within working days.

By rebuilding your original you will not need any form of coding or programming when you receive it back. During rebuild only the highest rated components are used by our highly skilled technicians. All coding is retained during test and rebuild — meaning that there is no need for expensive programming when you receive the unit back from us.

Our lifetime warranty standards demand the strictest quality control encompassing testing, components and workmanship. With a work defect rate lower than 0. Send us your package by tracked courier the shipping instructions are on the confirmation email. Once received we will test, rebuild and return your conductor plate with an unlimited mileage lifetime warranty. Fill in and submit this test form. If you require further information regarding this 7G Tronic Plus conductor plate, then please contact us.

All workers within NHS, emergency services, care, education, food, utility, delivery services etc. English English Italiano. Mercedes seven speed 7G Tronic Plus problems causing no gear selection. Remove the 12 screws that hold the control module to the valve body Remove the 10 solenoids that connect through the control module to the valve body make note of their positions for correct re-installation Test and rebuild: Using our bespoke Hardware-In-the-Loop HIL test rigs each 7G Tronic Plus conductor plate is tested both before and after rebuild to ensure that no faults remain.

Programming: All coding is retained during test and rebuild — meaning that there is no need for expensive programming when you receive the unit back from us. Quality: Our lifetime warranty standards demand the strictest quality control encompassing testing, components and workmanship. This is not a problem, if you prefer this option then follow the following steps: Fill in and submit this test form.

Print the booking confirmation email. ECU Transmission.

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Dashboard Instrument Cluster. Comments on "Mercedes seven speed 7G Tronic Plus problems causing no gear selection". I think mine as gone I have a scanner coming this week I will check it I only live down the the road from you in Ripley could I bring the conductor plate in to you myself or would you rather I go through the postal procedure. Thanks Karl. Hi Karl, you are more than welcome to bring us your part. These guys have helped me a few times now on different cars.

Great service Fully recommended. Sent a Renault dash into them, came back fixed in a good time, great communications while it was being done! I really appreciate the work the company has done. Really nice. Click to read more www. All Rights Reserved.Log in or Sign up. Mercedes-Benz Owners' Forums. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More. Software Update - 7 spd gearbox. I've been reading with interest the sticky about, amongst other things, the software update for the seven speed auto gearbox and wonder what exactly was the defect it fixed?

Can anyone please describe the symptoms of the fault? Many thanks. The main complaint was hard changes fro 1 and 2 gears, this involves someone with STAR who knows the boxes to re adapt the torque converter lock up. I know that Colin at MBS is very good at this and I have been in two cars that he has set up and the changes were seamless and you never felt a thing. It's to fix the harsh two into one shift.

It can help but IMHO it's such a complex box missing parts like sprag clutches over the 5g box to smooth down changes. I never liked a single car I've driven with this box. You should study the workings Steve of the 7g box, there is more than one way to skin a cat. The fact that adaption done correctly fixes most of these faults, and the fact that most of us have perfect changes shows that it is not needed, things do move forward with new ways of doing things.

This subject becomes boring Steve and you have no right at all to insist that my 7g is anything other than a delightful perfect box, the same as many others have told you. Exjag - If you are happy with the box at the moment, I'd leave well alone. I had a software update on my 7G done in March last year to fix a harsh shift from 2nd - 1st. This happened only when the box was cold, it was fine when warm. Apart from that, I thought the 7G box was excellent with very smooth predictable shifts and an uncanny knack of being in the right gear nearly all the time.

Since the software upodate, the professional chauffeur has been replaced by a learner driver and the car has never been right since. It has been back to 2 main dealers and one indy to reset the adaptions in an attempt to restore the previously excellent performance - with only limited success.

I can tolerate the car now, but it is not as good as it was or should be. Very few people seem to be able to set up these gearboxes correctly, so my advice would be to leave it alone and keep the dealer away from it.

7G Tronic gearbox faults

JodelJan 6, Well if the box is bad don't buy it. If they have updated it and adapted it and still the same means never get rid of it.

Theres 7g plus It is supposed to be better. Alex had a very nice 7g box in his R class. Colins first R class had a very nice 7g box. You must log in or sign up to reply here. Show Ignored Content.


Share This Page Tweet. Your name or email address: Do you already have an account? No, create an account now. Yes, my password is: Forgot your password?Log in or Sign up. Mercedes-Benz Owners' Forums. This site uses cookies.

By continuing to use this site, you are agreeing to our use of cookies. Learn More. Lots of you have been exceptionally generous and helped me with my gearbox problems. I would ask you another favour. Could you list any problems you have knowledge of that relate to the 7G Tronic garbox. Mr Fernandez went on to state that in Sytner dealerships in Bedford and Northampton they also have no knowledge of any gearbox problems for the the 7G. It is only me who has problems! I would dearly wish to prove them wrong Bob.

7G-tronic problem - Help

Several software upgrades over 3 year period. Eventually resolved approx 15 months ago. Electro Hydraulic Control Unit failed at around 50K miles. Fortunately vehicle was in last month of warranty. The long term reliability of this box does concern me. The vehicle always rolls back on hill regardless of whether it's in 'S' or 'C' mode. The dealer informed me that this was a feature of the 7G box. It can be a real pain as you need to use the handbrake or left foot on the brake. The wifes SLK with the 5 speed box doesn't do this.

The other strange thing it does in 'S' mode is if you pull up at some lights or a junction, just before you come to standstill you get a slight 'surge'. I'm not sure if this is the box dropping into 1st gear. It doesn't happen in 'C' mode.

Last edited: Dec 17, It wouldn't be so bad if the vehicle had a conventional handbrake but it really is a pain trying to negotiate a hill start with the foot brake and hand release.It was installed on all rear-wheel drive cars.

It is designed on the basis of automatic transmission of the 6th series and many parts are interchangeable. Theoretically ideal is the 6-speed for the stepped automatic transmission. Where the gear ratios are brought together and divorced enough to comfortably jostle in urban traffic jams, and to save fuel during long delays on an unlimited route. And thus that the switching of speeds were carried out imperceptibly, but without excessive fuss, when the driver brakes before dispersal.

But in Traditionally, in the 9th series, Mercedes engineers laid the controlled slippage of the clutches of the torque converter, which is already connected from the first speed from the lowest speed. To do this, just press the accelerator pedal. And this feature of the 9th series results in the rapid contamination of the oil by the clutch of the bagel and the rather early need for repair of the GDT. Strongly not waiting for the cherished tkm.

The whole family For AKP before there were four types of oil filter and crankcase. Now install two different oil filters and crankcase. The oil level here is very important, therefore the design allows it to be easily maintained and checked. At the moment, there are two different types of oil for the gearbox: ATF red, tolerance Frequent oil changes markedly prolong the service life of the box.

For bulkheads, the services are still preferred by reliable and expensive original overlays. Frictions on Mercedes fashion — one-sided, are replaced most often by frictions of package K2. They are followed by K1 clutches, but with burned oil it is advisable to change the complete set of friction discs. To all the above sets for a typical overhaul of an overheated box, almost always order another set of pistons.

In the bulkhead, the clutch packages K1 and K2 are checked first. It is there that one-sided clutches are burned. Masters claim that it is because of the abnormal operation that the hydroplates do not receive the required oil pressure properly, the clusters are burning, and all other problems are happening along the chain.

Since the designers provided repair of the hydraulic unit without dismantling the automatic transmission, this problem, noticed on time, is solved with relatively little blood. Oil is used here for two generations, differing: red to and blue after. The problem of capricious electronics has very much spoiled the image of Mercedes as a reliable manufacturer.

Replacement of the motherboard and hydroblock of the first issues of Mercedes accuses Siemens of everything. Keep in mind, in this mode the car accelerates not so actively, but still rides.

You can still live, but no longer work. And although the iron of this automatic is very reliable, but because of malfunctioning electronics, the problems of the oil pump lead to a chain of problems with the rear planetary series, with bushings. Many owners manage to prevent them, putting the car on time in the repair of automatic transmission. Owners of this modern and very comfortable automatic transmission should take it as a rule not to overheat the automatic transmission and in every visit to the car maintenance check the automatic transmission oil for color, the presence of dirt and shavings in the pallet.

Yes, and change the oil with a filter every 60 tkm. Once every two years, such costs for maintenance of automatic transmission — a small fee for the confidence in his horse. For reset, adaptation and personalization of 7G-tronic gearboxes possible using: 1.

Mecedes Extreme 3. Your email address will not be published.Log in or Sign up. Mercedes-Benz Owners' Forums. This site uses cookies.

2007 ML320 722.9 mercedes transmission shifting problems

By continuing to use this site, you are agreeing to our use of cookies. Learn More. I am just in the process of ordering a new C Class, and am poring over the details on all the forms I have been sent. One thing that stands out is that under 'Special Equipment' it is showing that 9G-Tronic is included. The price summary agrees with the price that I have agreed with the dealer, so it hasn't just been sneaked in as an extra.

Peter LankyOct 13, I think it's engine dependent which gearbox you get. JBellOct 13, My friend has the 9g in his ECDI. Seems like a lovely smooth box with a very long top gear.

YugguyOct 13, The 9G box is very long legged, mines sits at 1, RPM for 70mph. It doesn't often stay in 9th but you only know what gear you're in by looking at the display.

Another huge benefit of the 9G box is that it coasts better than a manual knocked out of gear. You'll find yourself just braking coasting behind other vehicles as it just doesn't lose speed, great for fuel economy if you plan ahead and don't brake. BlobcatOct 13, Submariner1Oct 13, 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.

mercedes 7g tronic problems

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.

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.

I found myself asking a lot of the same questions As a professional driver and a family man, how does one bridge the chasm between two worlds? European cars of the eighties and nineties offered a lot more than anything stateside manufacturers could offer.

mercedes 7g tronic problems

Interior designers have the difficult task of finding a balance of modern design without being too far detached from that which we've become familiar with. This is exacerbated by the heavy use of Written by : Kyle Bascombe.

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