I live near the Tesla office near Arastradero Road. The last time I rode my bike by and paid attention, there were very few Teslas visible in the parking lot ( though one cannot see very far in the lot from the street due to the terrain/landscaping).

I think that totally depends how high you are in the company and whether you're client facing.

I doubt that the majority of people that work for Mercedes drive their cars.

You’d be surprised on both counts. Union factory workers face significant pressure — as in slashed tires — from their peers not to drive foreign vehicles. Auto makers give sizable discounts to their employees.

Funny how you put outright vandalism that would cause hundreds of dollars of loss in such an understated manner (face significant pressure).

You should perhaps be more optimistic. ;) Mercedes has a program for "Jahreswagen" ("Year cars") where employees get cars at something like cost, drive them for a year, then can hand them back to be resold. There are a lot of these in Germany. It's popular way to get a nice car without paying the full cost of a brand new vehicle. [0]

[0] http://www.expo.be/en/jahreswagen/index_nl.phtml, lots more info if you read German.