Am I winning, re Old 190 Mercedes, blowing smoke.?

Well managed to solve the mystery of the smoke blowing from exhaust,.. after trying several helpful suggestions which cleaned up inside engine to say the least, redex in plugs helped engine now ticking over like a swiss watch and reek has gone. What it was was the Lambda Sensor on the exhaust was not connected up as I didn!t know this controlled the mixture of air and fuel, perfect. Now have electrical nuisance, dashboard light is showing continuious radiator warning light as I put in a new rad, and this is still showing, any safe solutions, want to keep bulb intact. Also keep getting ABS warning light from time to time then it goes out when turn ignition off and on? Have bled brakes new diskes, pads ect? thanks in advance people.