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GLA Hybrid Heating Issue Resolved

My 2021 Mercedes GLA Hybrid has a heating problem The rear window heating doesn't work, there's an error code, and the auto defrost isn't working I think it might be the battery Has anyone else had this issue with their car defrost or rear window heating?

A 2021 Mercedes GLA Hybrid experienced a heating issue where the rear window heating and auto defrost were not functioning, accompanied by an error code. The problem was suspected to be related to the battery. After checking the battery voltage and consulting a workshop, it was confirmed that a bad battery was the cause. Replacing the battery resolved the heating issues.

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4 comment(s)

Sorry to hear about the GLA's problems A weak battery can cause electrical issues, especially with the heating system When did you last check or replace the battery? Got a multimeter? Checking the voltage would be a good start

Thanks I have a multimeter What voltage is critically low and could cause the heating issue?

If the voltage is below 12.4V after the car's been sitting, the battery might be the problem A load test is best to see if it can still power the car defrost and rear window heating Given the error code and battery cost, a workshop diagnosis might be smart

Thanks for the advice I took it to a workshop and it was a bad battery It cost 290€ to replace The rear window heating works now

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MERCEDES

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GLA