OK, 1. I know silicone is not recommended in ABS systems, I assumed that was commonly known and shouldn't have 2. Switching to silicone makes sense IMHO only if the whole system is being adressed at once, because the old brake fluid needs to be thoroughly flushed out of everything. I've done it twice and that was when EVERYTHING was replaced:new metal lines, new hoses, new or rebuilt wheel cylinders - probably not practical for most MB owners with the cost of parts today 3. Simply draining the system and refilling with silicone is NG, that's probably what the guy did with the MBA. If he left moisture in the system when he drained it, it was still there. He wouldn't have been safe if it was filled with DOT3 either. So I retract my recommendation of silicone fluid to everyone except those few who would remove all of the old fluid
