W126 SEC auxiliary fan replacement

Once I got the air conditioning working on the 560SEC it was apparent the auxiliary fan was not working. As can be seen in the wiring diagram below, the W126 SEC auxiliary fan can be triggered either by high coolant temperature or by refrigerant pressure. The diagram is for 1986-1990. In 1990, the W126 went to a dual fan setup. The fan can operate at two speeds based on a resistor.

My fan would not work even when fed 12v directly. I struggled to find a replacement fan from a brand I trust. I wasn’t that keen on a […]

W126 Transmission Mount

The motor mounts were changed on the 300SE around six months ago, but there was not time to do the Transmission mount. It was obvious it would need doing from the condition of the motor mounts. In addition, I was feeling some vibration from the drivetrain at various times.

changing the W126 transmission mount is generally a simple affair. The transmission is jacked up a little, with care taken not to dent the pan. The mount is freed via three bolts – two on the crossmember with a 13mm socket and one to the tail of the transmission with a […]