Battery Alternator error on Mercedes-Benz W203

The appearance of such an inscription, most often occurs after driving through deep puddles to the rapids or careless washing of the engine. The point is a faulty generator, you can’t drive like that for a long time, the battery will sit down to zero, because. the generator does not recharge it and does not generate additional energy. 

The appearance of such an inscription, most often occurs after driving through deep puddles to the rapids or careless washing of the engine. The point is a faulty generator, you can’t drive like that for a long time, the battery will sit down to zero, because. the generator does not recharge it and does not generate additional energy. 

A new generator for this car is not cheap, so we just fix it. 

It most often burns a microcircuit with a winding or sensors. There are problems with the relay, then the repair will become a little more expensive.

Source: http://autogener.ru/services/instructions/battery-alternator-w203.php