ML320 headlight light now OK
 

Woo hooo Ive cracked it ,it was the light combination stalk after all,for your info but cheers, it dosent have a relay in the fuse box,other than relay solid link for day light running,the car has an activity computer "Costly".stalk cost £45 quid from breakers yard,just got find out to use this web site,franky,cheers