Mercedes Benz Thermostat with Housing Assembly - 1AEMX00304

If your car is leaking coolant around the thermostat, or your thermostat housing is broken or cracked, then this could be your solution.


  • Engine Water Outlet
  • Aluminum construction
  • Includes thermostat
  • Replaces dealer part numbers: 272 200 00 15, 272 200 01 15, 2722000015, 2722000115
  • Direct replacement
  • Built to strict quality control standards

Over time from thermal expansion and contraction the mating surfaces on the housing can warp or crack. If you are experiencing any of these issues replace your thermostat housing with our direct replacement part.

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser. Please keep your invoice for proof of this warranty.

5.0 / 5.0
7 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
So far so good
No problems at this moment, the part works as specified. Engine light is off. Great price and delivery. If I need another part I will order from this place.
August 22, 2017
8 months ago
MB ML350 Thermostat
So far so good ..on my thermostat that was installed about a week and a half ago that I got from 1A Auto . I feel like they were quick and precise. I got the exact product I was supposed to get, in a very economical price range. Thank you 1A Auto ...I hope to choose you and your products in the future.
March 14, 2017
1 year ago
As described and working great
Had a thermostat issue, bolted this unit on and issue went away. Working as it should three weeks in. Thanks!
March 18, 2018
1 month ago
item arrived fast. well packed and was the right part!
installation was a breeze and the price was amazing. will definately order from you again!
November 28, 2017
5 months ago
Great price $42.50 compared to 300.00 at the dealer. You guys rock.
March 15, 2017
1 year ago
Mercedes thermostat
The part arrived when promised and the price was right. Installed it a few weeks ago and it seems to be working well.
April 17, 2018
3 weeks ago
So far so good
It is easy to assemble, it works well so far.Considering the reasonable price, this will be a good choice if you need a new one.
More feedback may be available after a long time test.
January 2, 2018
3 months ago
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 1 question Browse 1 question and 2 answers
What is the Temperature this part will hold?
Sharonda on Jan 16, 2018
BEST ANSWER: This part is made the withhold whatever the engine is producing. However this part controls the temperature of the motor, so it wouldn’t overheat. This part opens at 90 degrees F allowing the circulation of the coolant, so motor wouldn’t overheat. Thanks

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Part #: 1AEMX00304

Ships Same Day for orders placed by 4 P.M. ET