I was checking my fluid levels today and found that my level control/4matic hydraulic fluid is low (below the MIN. mark on the dipstick). I purchased my car 3 months ago, a 1990 300TE 4matic wagon with 102,000 mi...., so I'm new to Mercedes & this forum (which is great) The fluid specified is a specific Mercedes item. I'm going to order some online but I'm wondering if I could use some other hydraulic fluid until it gets here. Should I even drive the car? Thanks in advance!