On a Beocenter 1 it should be standard but an easy way to check is try to put it in 'option 6' if the red light blinks then it has an ML module fitted.

kijf001:

serial number = 8520

when v.opt is set to 1 or 2, standby light gives 1 blinck.

If it does not blink when you try 'V.OPT 6' then it does not have an ML module fitted.

kijf001:

are you sure? because of the connection on the backsite? if you are, is it difficult to install a ml module?

Yes I'm sure, Beovision 1 & early Beocenter 1's had the socket for ML but not always the board inside.  As for the fitting, it's not too bad but you might want to get a quote from an engineer to do it, it doesn't take long if you know what you're doing.

Thanks for your help. I will contact the dealer what to do.

cheers