I don't see how a failed servo or failed aux pump would have any bearing on the main cooling system. If they trap air, who cares as long as the main cooling system is circulating water. If they "burp", you'll find air in the radiator which you can then bleed out. It's a non-issue.

If your cooling system is operating correctly, the temp gauge should be pretty well dead-center. 190-205˚ isn't out of line for pulling up a hill or hard acceleration. If the temp comes right back down, it isn't an item to worry about. Check your boost pressure. If the turbo is making low boost, you'll be running high EGT's.

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Current stable:
1995 E320 157K (Nancy)
1983 500SL 125K (SLoL)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Gone and wanting to forget:
1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]