Honestly? It all looks clunky. I would rework the entire thing from the logo on up. Is this all your design or some of your client's? This can look a lot better while still looking masculine.
However, if most of these elements belong to your client, there isn't much you can do outside of Blue's suggestions.
Just so you know- this is not a place I would take my car for service from what I'm seeing. I would be scared. Maybe I sound like Simon Cowell, but so be it. I'm just being honest. Find a way to make this more simple if you can.