Both the GLA 200 and GLA 250 have different powertrains ：
Powering the GLA 200 is a 1.3-litre turbocharged 4-cylinder engine which is built by Renault. This engine makes 163 PS and 250 Nm, and is mated to a 7-speed dual-clutch automatic transmission. Mercedes-Benz claims a 0-100 km/h time of 8.7 seconds.
The GLA 250 is powered by a 2.0-litre turbocharged 4-cylinder engine (224 PS/350 Nm) that is mated to an 8-speed dual-clutch automatic transmission. This gives the GLA 250 a century sprint in only 6.9 seconds.
Yes, Mercedes-Benz GLA is available in Bluetooth. The available Bluetooth variants are: 2018 Mercedes-Benz GLA GLA 200 Urban Line, 2019 Mercedes-Benz GLA 200 Style, 2020 Mercedes-Benz GLA 200 Night Edition.