Hello, lately I am a lot on the road with our Smart 451 BJ2014. Good economical car for the way to work. Only the sound of the speakers is really sad. So I thought of an upgrade. At that time this smart was bought without all the extras. No radio, no electric mirrors, no nothing at all. Loudspeakers were installed in the doors however, therefore a radio was retrofitted. But the speakers seem to be no good at all. Even at low volume levels they start to oversteer strongly….. He also does not have tweeters, there are instead the levers to adjust the mirrors. Question 1: What kind of speaker size can one buy best for the smart? Bits of conversion work is already required I have already seen. Question2: Can one simply remove the adjustment levers for the mirrors and for that the disguise with the cut-out for the tweeters build up? Electric mirrors apparently shouldn’t be so easy for every 451 and also cause considerable costs. From that I have never adjusted the mirrors. Wouldn’t miss that. Greetz Coree