I have a 96 W210 with 175,xxx miles.
I have had this thing since 98 and kept track of every repair and expense since the warranty expired.

On average, it's costing me $2,000 per year for maintenance including tires. Tires seem to be the most expensive and reoccuring item ($800) as I need new tires every year.

Assuming that cost of tires is removed from this amount, is $1200 per year a reasonable amount to spend on yearly maintenance?

What are you averaging and on which car?