Review on Behr Hella Service 351321141 Applications by Daniel Evans

This was the exact same block as the original Mercedes Behr block. Much cheaper than the $380 the Mercedes dealer wanted for sure! I ended up sending it back as the fan motor was defective, not the controller. Connect a 12 volt light bulb to the output to test the output. As you adjust the fan speed, the light should dim and brighten. The main unit is cutting power because the light isn't drawing enough power, so turn the key off and on again after waiting a minute and it will try again. I just assumed it was the regulator as I've had to replace it with another Mercedes in the past. Got a fan motor on Amazon for only $85! Of course the dealer hits!