Erick,
I would simply Google like this ----> Mercedes Dealer in Halifax
There are several shops that would help you out to take photos and listen to the engine etc. then give you a good idea.
BTW ... There is one for sale here in London, a 280 SL, red California car ... They are asking 55K after the shop did some brake work, fixed a water leak, mechanical tune up and a complete re-paint. I understand the price is negotiable.