Comment by psd1
6 hours ago
> 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.
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.