thanks for the helpi got the car sorted today i got the lights turn off at a local garage i sent the dsc control unit off to remans in kent which cost £120 to fix it and then i but it back on and the garage reprogramed it and turn the lights for £45 so in total it cost £165.00 not bad considering another bmw garage was going to charge me £900 for a new dsc control unit and another £200 for takeing and puting it back on and reprograming it so if anyone else has this problem with code 81 fix it your selt then get it reprogramed it took me 20 mins to take off and the same to put back on hope this help