I've got several and have reasonable performance from nearly all of them. One of the slickest is the BlueDriver, which a Bluetooth OBDII scanner. I keep it in my XFire console and the APP is installed on both my cell phone & tablet. Enables me to read diagnostic codes anywhere I am if the car acts up. Usually take it with me on trips if I drive another one of my vehicles.

The other scanner I like is the iCarsoft MBII i980 I have. The one I have is for Mercedes-Benz & Sprinter. Cost me $160 (somewhat pricey), but it reads not only the diagnostic codes but several of the powertrain management & SRS codes. Turns out there are not as many powertrain management codes on the R170 chassis that can be found. M-B kept adding to these as the chassis design was upgraded in the following years. And yes, it will read the SRS airbag light, indicate what the issue is and clear the light (like so many folks dealt with during TAKATA airbag recall service).