E300 Hybrid Automatic gearbox problem

[GJL69]

Hi All,
I'm new to the forum, but very keen on getting help with my E300 Hybrid 7G gearbox. Originally the car brokedown with RED transmission issue stop, error codes related to the solinoids. Car was recovered, gearbox serviced and was ok, but not 100%, car seemed to be slow pulling away or a hard acceleration in lowest gears would result in loss of all gears. If I turned the car off, wait and restart it would work again. Car want back into the garage and I was told it needed a new gearbox. I wasn't convinced so sent it to Mercedes to confirm, result was the same. Went on to change electric pack, valve body etc to try and avoid cganging the gearbox, but still no good. Finally changed the gearbox for a used one and still have problems. The garage are telling me that the issue is something stopping the automatic setup of the gearbox adaptions. Furthermore, when they changed the electric pack they failed to keep a copy of the old settings. Now they can't even put it pack to its original condition. Currently the car will drive after resetting the adaptions, but only for about 10 minutes, then it's like driving a car with a severely slipping clutch. Nightmere!
Has anybody got any advice, ideas or hopefully a cure? If anyone can share the transmission settings so I can ask the garage to manually enter them might work. I don't think the garage really know how to fix it, latest advice is the change the solinoids, but I'm not convinced.
Hope someone can help end this nightmere for me?

 

[Headhurts]

I had one of these brand new from 2014 to 2016 and it was faultless and although I really have no technical knowledge to help you I can say that these cars are very complex.

It appears to me you may have already spent a fair bit on your car.

If you are determined to get yours up and running then I would seek out someone who really understands these cars and has ability to connect to Mercedes Benz servers, this may mean phoning around the dealerships or specialists who can and are willing to take this on.

Good luck.

Robin

 

[mioba]

As Robin.

Seems like your garage doesnt know what he is doing and it has cost you a fair wack.

You will need a MB specialist who can connect to star/xentry so make sure the settings are those for your car.

It may well be cheaper to bite the bullet and go to a dealers - they will charge you a nice sum. They may also say the electric pack you mention canno be written to and are programmed at factory - which will cost.

Seems you got a can of worms/headache to deal with.

But first call for me would be a real good specialist.
where are you located - someone may have a tip.

 

[GJL69]

Hi All,
Thanks for the replies. I've had the car in with the main dealer twice, but no joy even with Mercedes Germany support. The biggest issue for them was my garage cleared all the error codes. Nightmere! But I'm hopeful there's someone who can help.

 

[star]

As a rule of thumb, servicing the gearbox will not cure electrical faults and you waisted your money there. It's very difficult to diagnose a fault when the faults have been cleared, the original gearbox and tcu swopped out. When you fitted the second hand gearbox, did you fit the original tcu and valve body?

 

[alexanderfoti]

When you fitted the second hand gearbox, did you fit the original tcu and valve body?

I agree, and this is an important point. Flow data in the valve body is matched to the TCU, so chopping and changing parts is going to make it complicated.

 

[GJL69]

Thaks all. The original gearbox had a new valve body and TUC fitted, but didn't work. When the garage changed the gearbox they moved these new parts to the replacement box.

 

[GJL69]

Hi All, Does anybody know the nominal adaption values for the 7G automatic hybrid gearbox? The plan is to add the values manually and them switch to the dealer tool to run the automatic setup. A screen shot of all the settings for the gearbox would be great. Many thanks for support.

 

[alexanderfoti]

You can't set adaptions manually.

Zero them all out, then carry out the on road adaption procedure at different torque ranges.

 

[GJL69]

You can't set adaptions manually.

Zero them all out, then carry out the on road adaption procedure at different torque ranges.

Ok, thanks, we'll give it a go.
Many thanks for support.

 

[GJL69]

Ok, thanks, we'll give it a go.
Many thanks for support.

Hi,
I told the garage, but they told me its not possible to zero out all the adaptions. They said you can't enter zero values to them all as the car wouldn't drive. Any ideas?
Cheers

 

[alexanderfoti]

You don't enter adaptions, you reset them.

I suspect they are referring to something else as "adaptions" which is why they make no sense.

 

[GJL69]

Hi, they've replied with the following... There has to be a base value, 0 would put the car in a state of no actuation. There needs to be a base value. Don't know if this makes sense to you. Does anyone know the nominal base values, May e that would help. They are looking at sipping the gearbox clear and reinstalling the software from scratch. Any advise? Many thanks for support.
Best regards

 

[alexanderfoti]

This makes no sense to me.

I'm out.

 

[GJL69]

This makes no sense to me.

I'm out.

Ok, thanks for trying.

 

[Srdl]

Ok, thanks for trying.

And that’s from one of the most respected professionals on this forum

 

[GJL69]

And that’s from one of the most respected professionals on this forum

Thanks all. Does anybody know a good expert in the Telford area who could support? I'm confident this is just a software issue, but need the right company to support.

 

[brandwooddixon]

I suspect that new parts would need coding to the car requiring an online connection to MB.
The control units will come pre-programmed with baseline values from the factory, this is what the units revert to when the adaptions are reset.
I don't know anyone over in Telford, who performed the initial work was it an MB specialist?

 

[GJL69]

I suspect that new parts would need coding to the car requiring an online connection to MB.
The control units will come pre-programmed with baseline values from the factory, this is what the units revert to when the adaptions are reset.
I don't know anyone over in Telford, who performed the initial work was it an MB specialist?

I understand. My garage claim to be a specialist including hybrids. They did connect to MB online because it's an anti theft item, so they told me, so I believe it was done correctly.

 

[brandwooddixon]

I would suspect that the car would throw error messages if it is still misbehaving, even if the codes were previously cleared.
I've been using WDM (now in Aldridge) for many years, I've always found them to be honest with issues.