Reset climate control

Question edited for a lot more clarity.
Question moved to model category.

Sometimes they are just on, and sometimes the SRS will flash. Connect to a pro grade scan tool computer and look for the diagnostic trouble codes associated with the fault status.

https://www.google.com/search?q=Mercedes+W169+SrS+system+light+on

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may be a factory setting do u use all of the controls on the panel for air, etc?

You need a manual.

follow this u tube link may help
Mercedes Benz class W169 Remove Central Airflow Deflector

Try disconnecting the alternator electrical connectors, if it still goes dead have the battery tested, it may have a shorted call.

Your system air condition is controled by a climate control.The panel will be at fault,You can pull a code using a scan tool that reads MBZ climate control,The solution for the fix is the climate control this is a module

Its probably the blower itself.

This paticular climate control system uses stepper motors unstead of vacuum elements to control the blend door positions. The best way to diagnose this problem is to have the climate control computer scanned for codes and then you will have a beter idea of which component is failing. You can pull codes riht from the climate control head unit but you would need to purchase a factory manual to explain how to do this and what the codes mean.

hello,good day,you can reset your all electrical system by removing the negative cable,but be sure you have radio code,or you can go your dealer to scan your fault,using hht or star to that you know what system have fault even it is temporary,ty

I would go with a fan motor, but would like to see this myself first.