Date registered: Jul 2010
Vehicle: '85 300D Turbo, '91 420SEL, '92 190E 2.6, '09 C350, '12 E63 Wagon
Location: Arcadia, CA
Mentioned: 10 Post(s)
Quoted: 581 Post(s)
Check Coolant Level - Coolant Color is brown
When it happened to our W201, the independent shop who diagnosed and fixed the issue mentioned that the transmission fluid goes into the coolant, and not the other way. (This kind of made sense to me, I guess one system is run at higher pressure than the other, so I tried to take the advice to heart).