<< I don't agree since since using electrical fan save some power and then
ask less work from the engine. >>
In normal driving conditions the engine is cooled by the air passing through
the raditor without the help of a fan. The orginal electromagnetic fan is
running only when it is needed, and that's mostly during a traffic jam (not
even at the traffic-lights), so any loss of power is insignificant.
My 504 and I get stuck in a traffic jam almost every day and it never let me
down.
IMHO if your car has a fan driven permanenty by the engine a change to an
electic fan would be a good idea.
regards,
Rainer Wilken