Vacation Notice - Our offices will be closed from August 7–20 for our annual vacation. Our online store will remain open, and you may place orders as usual. Orders placed during this time will begin shipping on August 21. Thank you for your patience and understanding. We appreciate your business!




"The red tip Hirschmann antenna we ordered is the real deal high quality part we hoped for and it arrived packaged well and soon after the order was placed by phone. A business run like that is hard to come by in a sea of mediocre parts slingers. Thanks for getting one of the final touches to us for our restoration project."
"Great customer service 10 stars!!! lots of had to fine classic parts for your 190SL to your 280SL. A long time client. I would recommend you stop by this website and take a stroll. You might find what youve been looking for.."
 Return to Heater Valve O-Ring Seal - fits 190SL 230SL 250SL 280SL 300SL & More
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5 of 5 March 18, 2026
Reviewer: David Foster from Marblehead, MA United States  
not much to say about an oring-- it worked

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5 of 5 September 16, 2025
Reviewer: Anonymous Person from Reno, NV United States  


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5 of 5 Mercedes Heater valve O-Rings July 10, 2025
Reviewer: Anonymous Person from Seattle, WA United States  
Perfect fit and shipped fast.

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5 of 5 April 21, 2025
Reviewer: *# BAYBERRY VINTAGE AUTOS from HAMPTON, NH United States  
Did the trick

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  0 of 0 people found the following review helpful:
 
5 of 5 October 11, 2021
Reviewer: Christopher Montana from Cary, NC United States  


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5 of 5 August 10, 2021
Reviewer: John Brownell from Telford, PA United States  


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5 of 5 October 14, 2020
Reviewer: Andrew Feustel from Houston, TX United States  


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5 of 5 Heater O ring March 30, 2015
Reviewer: Jon Bernardi from San Marcos, CA United States  
Spot on

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5 of 5 Heater Valve O-Ring Seal - fits 190SL 230SL 250SL November 17, 2014
Reviewer: reg wilson from victoria, BC Canada  
nice fit   fine part   came quickly

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