>> Unfortunately, the "surge" problems could be caused by many things...my W124 has the problem, and I just live with it, <<
hmmmm It's not too annoying so I'll forgoe too much investigation until the next service interval at 60k.
>> MB temp sensors are dynamic, so you will notice the gauge needle rise and fall as you change speeds, ambient temps, driving environments, etc. <<
That was simple. That eases my mind on that front.
1997 E420 - Kensington, Md.