Review on VSTM 3Meter OBD II Vehicle ECU Emergency Power Supply Cable Memory Saver with Alligator Clamps and 12V Car Battery Cigarette Lighter Power Extension Socket by Christopher Bates

I'm an automotive technician, but Mercedes, BMW and Audi have complex and strange, even arbitrary and useless features that are exclusive for one reason or another. Lots of electrical presets and stuff for all sorts of things in these machines. However, I knew I couldn't just unplug and plug the terminals back in and expect that the only problem I would have was reprogramming the radio channels. So before changing the battery of a 2010 Mercedes C-300, I scoured the internet and made sure I had the right memory saver mode (which I luckily did). Luckily after installing the battery everything worked and I didn't have to use exclusive expensive hardware. ***** IMPORTANT NOTICE ***** I strongly recommend that you purchase a small 12 volt battery to power it on. up to. I found a small cheap one on Amazon for $17 or $18. If you are a DIY enthusiast and cars are a mystery to you, you may have seen a video of many of them using an expensive $100 power jumper to ensure there is a constant power source and the car bring to save the presets. . .NOT NECESSARILY. A small 12V battery is just as good!