Sounds like you need a serpentine belt. I'd have it towed (if you can afford it) to the nearest shop.
You are having fan belt problems.
Check your fan/accessory/serpentine belt.
Alternator Belt has snapped, causing you alternator to stop charging causing you battery light to come on, but this belt also runs your power steering pump which if that's not working your steering will become heavy
The transmission and power steering are usually two different systems. The transmission drives off the back of the engine and the powersteering pump normally drives off a belt on the front of the engine.
Most likely replace the clock spring. Or check all plugs going to the stereo unit including inside the Steering wheel. Be sure to disconnect negative battery terminal for 2 minutes before opening the steering wheel for safety reasons regarding the airbag if fitted.
your horn is not working, the alarm has a different horn.
working of a lead acid battery
The power steering of Mercedes A Class can be reset by switching off the engine and starting the car again. The power steering fault is quite common in Mercedes A Class and this is either power steering intermittently working, not working at all or operating all the time even when engine is OFF. The last catagory drains the battery. if the power steeering does not work at all then you there may be blown fuse Number 48/49 under the driver foot in the battery compartment. Or it could be due to correded/ broken conections under the washer resevoir or fault in the alternator not producing enough power in the blue wire which enable the power steering. Merc doctor
alternater may be going out it may only have mints to live it happened to my f150
The wireless controller of a PlayStation 3 could stop working for a number of different reasons. If it stops working because the battery will not hold a charge you would need a new battery. You could still use the controller by plugging it into the PlayStation 3 and using it while it is plugged in.
Check the power steering pump for fluid as well as make sure that the pump is working and the belt it tight. If the pump is not working then the steering will be hard to turn.
Low fluid level? Bad steering pump? Worn steering rack?