[psd1]

> You can use OBD2 dongle to change default setting of lane assist

Colour me skeptical. ODBII is just a protocol; it knows nothing of the modules on your buses. I think you will find you need the dealer software. Tools exist that implement big chunks of that functionality, but since they are built on reverse-engineering, the price approaches the dealer software anyway.

The only place i found the Mercedes software was a paid forum that obscures the links. Getting the cracks working was a magic incantation. It's similar for VAG. They won't sell you the software if you're not a dealer.

You will not get there with a £40 ebay special. If you can, please share what works, it will be of much interest to many.

[glitchcrab]

You're correct that the dongle only facilitates the connection, but you don't need dealer software. I have an ODB dongle and a £20 (I think) app on my phone which lets me change a _ton_ of settings on my BMW which aren't available in any in-car menus.

[psd1]

What app?

[glitchcrab]

Bimmercode lets you do coding (it's very powerful and you can easily mess up your car so you have to be very careful with it), and Bimmerlink lets you read fault codes etc.

[psd1]

Does it label the fields, or are you following forum instructions to write 0x01 to module 76 channel 004?

[glitchcrab]

Safer settings are exposed with decent labels, but you can also use the advanced mode which is much more low-level, akin to what you described.

[psd1]

Thanks, i learned something new. I think we're both right by degree. That app is more functional than anything I've found, but there comes a point where you need someone to tell you the modules and fields or you risk bricking your car.

[vincnetas]

not affiliated. have used ODB eleven on my vw eup (2021). They have curious payment strategy. Basically you buy tokens and then use them for each enable/disable operation.

https://obdeleven.com