thank you both for responding and giving me your input , valid points from both of
I am so new to this type of automotive tech and mercedes my learning curve has been exponential , Unfortunately our budget has been blown by works done thus far, that what i was going to spend on a scanner has been consumed , as the vehicle no longer travels more than a few km without issues i cant take it anywhere to be scanned and have already wasted money getting someone mobile to it. who gave me no print out or sent an email with the list of error codes, i wont go into my response to this gentleman, lets just say i will not be calling on his services again .
i am now leaning to think it could be a security module as when disconnected the lights windows etc do still work , which had me a little confused but thank you nation wide for your imput i will further research this
thank you witek_m i will have a look now at the link you sent , and your advise about throwing parts at an issue is definately expensive and FRUSTRATING indeed
I will now find a mobile technician who has the equipment and good business practice to give me all fault codes that are pulled up
my symptoms are as follows
intermittant , 1 day i may get 20 to 30 km all good car drives beautifully , other days i will 1km before this
instrument cluster goes hay wire , all gauge needles going up down , all warning lights flashing like christmas tree, beeping constantly , eventuating in trans not going past 1st or 2nd gear like a limp mode, when you've pulled over and shut the car off sometimes it will re start and take off sometimes all good its cleared and you get to your destination , other times it will not start for 15 or so min , and have just noticed it occasionally will show a start error message , again after you disconnect battery fiddle around for awhile it starts runs great but eventually out of no where it all starts again, its becoming dangerous , i dont want to get stuck in an intersection (as has happened), the complete freak out of the cluster is what lead me to think it was possibly a BCM , when i searched for the part number is when i found it on ebay being described as a BCM from an ML320,
Please excuse my ignorance in these system and modules , i sincerely do not want to waste your time , i was hoping it would be a simple yes or no, as i am discovering there are very few simple yes or no mercedes answers or at times logic ,thank you both for your time and patients.
before i go what scanner would you recommend for the 2000 ml320 for around the 250 to 350 price range, obviously i need one as much as you need any other hand tool