It seems that the leak from my car's resevoir is not the brake fluid, sorry about that. It appears that it is transmission fluid. The mechanic says he has to have some kind of special tool to get the cap off the resevoir. Is this something that is normal for 99 323i models? I see him this weekend, I will doublecheck.
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1999 BMW 323i Question: Earlier question details were in error.
Answer #1patrick mannion from Greg Solow's Engine Room, February 26, 2009, 20:34Master
There are three types of transmissions used in your car, a General Motors transmission and German manufactured transmisisons ZF. It is critical that the correct type of automatic transmission fluid specific for your transmission is used and that the method BMW call for checking the fluid level is followed (they want the fluid checked at 30 to 50 degrees centigrade). Some transmissions have a dipstick and are filled in a traditional manner, others have a plug very near the bottom of the transmission that is removed and if fluid trickles out the fill level is correct.