hey bro..
im from sg long..
i don think theres any workshop here for bmw but theres one in balakong..
the shop is behing maybank..
they do all continental cars..
i've been there once to service my volvo..
hope it helps..
i don't sevice my car around sg long area..
i service it at kuchai lama..
anyway can u describe slightly about your car..
see whether i've seen your car b4 a not..
cheers..