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Since its founding in late 2008, 500Eboard has become the leading resource on the Internet for all things related to the Mercedes-Benz 500E and E500. In recent years, we have also expanded to include the 400E and E420 models, which are directly related to the 500E/E500.
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500Eboard Management
Blows warm air even if should cold
- Thread starter KoLoS
- Start date
In my case, a new monovalve (heater control valve) fixed a similar problem. There are 2 versions of it (earlier and later; separation is by VIN and not model year). Use your VIN to determine which one your car has. Here is a "how-to". Although specifically for later version of the monovalve, it's practically the same for both:
www.500eboard.co
HOW-TO: Replacing Monovalve 1995 E420 | "HOW-TO" Tutorial Articles
I had to replace the monovalve on my 1995 E420, it's not a hard job but fiddly. My car has the "later" monovalve. Tools Needed: Slotted screwdrivers medium size; small screwdrivers and/or awl and pliers for rubber bumpers, shop rags for spilled coolant, saran wrap or equivalent to create vacuum...
