Check out what Jeffsr had to say in this post. It may apply.
W124/260E Cold Start Valve
Use the SEARCH facility for misc. 190E questions. There's been a ton of info posted here for this model.
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.