04 Z4 2.5i Coolant leak, looking for repair shop in los angeles (so.bay, cc, lax).

hey all. newbie here.
i've got a 2004 z4 2.5i @ 93k. had it serviced at the m shop in eagle rock just before 90k, no problems.
couple of weeks ago, the coolant indicator light switched on / off intermittently, whether hot or cold seemed irrelevant. temp gauge hasn't gone over middle + 1/2 tick toward hot at any point. so i topped off to appropriate level, light remained off for about a week. then, sequence repeats (coolant light on, same temp, no leak, so topped off). i noticed in the morning, after 2 days of not driving the car, a puddle under front driver's side. guessing this is either expansion tank crack or water hose? it'd be nice to learn how to figure this out on my own, but i will own up to it: i am lazy.
i don't much feel like having to deal with the attitude of the m shop again, nor the wait time for the next avail appointment. not to mention that it's in eagle rock and i live in playa del rey. can anyone recommend an honest shop from whom i can get competent and timely repair?
looking anywhere in playa del rey, marina del rey, culver city, el segundo, redondo beach, manhattan beach.
thank you in advance for any recommendations!