The GLA45 Service Instructions linked here may be of help, specifically:
- GLA45AMG 156 133 Drain Pour Coolant.pdf
Here are a list of service instructions for GLA45 AMG. The forum only lets me attach 10 PDF files in a post. More PDFs in posts below. Included instructions: ServiceSheet.pdf GLA45AMG 156 133 Oil Change.pdf GLA45AMG 156 133 Rear Axle Oil Change.pdf GLA45AMG 156 133 Rear Axle Gear Oils...