Some of the brake system components will have the mfgs. name on them. I recently inquired into the cost of new front calipers for my ride and learned that the ATE calipers were MUCH cheaper than the Bendix. You'll need to get in and look at what you have before you order parts.
1991 300-SEL - Model 126
M103 - SOHC
James Madison - Oppressors can tyrannize only when they achieve a standing army, an enslaved press, and a disarmed populace.
Liberty Firearms Training - After years of trying to regulate California criminals with a never ending stream of gun control laws they have still not given up with the belief that if they make something a crime that criminals will miraculously start obeying the law.