Took our 2003 C230 Kompressor hatchback in for it's B service and the dealer says we need a new "engine" vacuum pump. But as they explain it, it's really an electrically driven pump since this four-cylinder engine is supercharged.

How hard is it to replace this pump? Wife says the HVAC is acting up and I presume erratic suction is the reason.

I'm a good mechanical guy, but I can't find a manual that explains anything on this car. Where is this pump mounted? Is it something that I can replace? The dealer wants $400 to do this job.

If that is all they want then it must be pretty easy!

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra

Yes, I'm sure most of that cost is the part itself.