IMHO, you can first make a simple debt to income ratio calculation. based on combined household income & expenses, it would be something like this:

1500(condo)+1400(car)+1000(maintenance cost assumption) / 9000 * 100% = 43%

so, if your definition of "affordability" means "whether car loan will be approved by bank & after purchase you can still pay for 1k monthly maintenance?", then the answer is YES because 43% is consider quite ok. not forgetting that if you get good increment & able to maintain/decrease your expenses, the percentage will get lower & improve year-over-year

maybe the question you should ask is why do you need a 316i? it helps to uphold your image in the field you are working in (eg. I do see friends in management ranking drive bigger & fancier car)? does it help to increase your future income (eg. In insurance or direct selling field, its important to uphold image to your customer)? fulfill a childhood dream & your need for speed? etc.