Tell me exactly what the Bars Leak destroys, then tell that to a car and a truck I own(575,000 miles collectively).
I have found that H2O pumps last what seems like forever and leakage goes bye-bye.
I'm not suggesting this as a remedy for your primo Benz. All I'm saying is that in some cases the stuff does seal and does not damage the auto.
I haven't had to use it in my Benz, but when she gets to be a bit more geriatic, I will.
Over time, vehicles develop "hair pin" leaks that are not easily detected by pressurized analysis. Bars Leak does a superb job of sealing these kinds of leaks.
If there's a "snake oil" I believe in, it's Bars Leak and NO, I do not work for them or an affiliate.