The low fluid level will not turn those lights on. That fluid reservoir is for the power steering and hydraulic leveling systems. As for as the fluid , use only the MB fluid to top it up. I would also suggest having the systems checked for leaks if the fluid level is low.
The most common cause of those warning lights is a failure of the brake light switch, but it could be something else also. You need to have the fault codes pulled to determine the cause of the warning lights.
Good luck, Robert.

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Mercedes Benz Master Tech - Retired