How do you know if your 2003 E320 has sbc brake system?

All 2003 E-Class cars have SBC brakes.

The E-Class w211 model had SBC brakes, untill the facelift in 2006.

W211´s with SBC = 2002-2005 models with "1a" in VIN.

W211´s without SBC = 2006-2008 models with "1b" in VIN.