I would start with www.getmercedesparts.com/ which looks like a genuine place to search for Mercedes parts. I would also advise to contact local dealer.
One can buy Mercedes car parts at any Mercedes dealership or any car store from Germany. One can also buy these parts online from KMS Parts, Mercedes Benz Parts UK and Breaker Yard.
You can buy new parts at Performanceproducts. com
you buy a reset tool from parts shop
depending on your location, a place named Bap-Geon.
As of July 2013, there are several stores where a person can buy a wiring harness for the hazard signal switch for a 1977 Mercedes 450 SLC. Some of the names of the stores are Auto Zone, Advance Auto Parts, and O'Reilly Auto Parts.
The most reliable source for Mercedes parts is at the actual Mercedes website: http://mercedesparts.europartsdirect.com/ although you can also visit this five-star site that also distributes Mercedes parts: http://www.autopartswarehouse.com/
You can purchase replacement parts for Mercedes automobiles direct from Mercedes-Benz (mbusa.com) or from numerous auto parts resellers. Online you can also order parts from retailers such as JC Whitney or Amazon.com.
replace the engine, coz parts alone almost you can buy another engine.
One can find parts for a Mercedes CL500 online from various retailers or in car repair shops. Alternatively, one can check his or her Mercedes dealer to find parts.
You can buy a generic lighter that will fit and work at most auto parts stores. If you want an OEM Mercedes lighter you may find one at a salvage year or you can get one at a Mercedes dealer. Also try eBay.
for a car that year, you could get away with the generic brand parts store antifreeze for $10. BUT if you want to have piece of mind, buy Zyrex G05 (gold bottle) for $15 from parts quest and that meets Mercedes spec.
Mercedes parts can be purchased directly from Mercedes-Benz website as well as The Parts Bin. Depending on which part one is in need of. Searches can be done on both sites with prices listed as well.