Bleeding W126 brakes with a Motive Power Bleeder

I recently changed the flexible brake hoses in my 1986 300SE. I wasn’t sure how old they were and they are a wear item. The next step was obviously bleeding the brakes. Bleeding W126 brakes is really no different to any other car. I recently purchased a Motive Power Bleeder to make this job easier.

I’ve bled brakes many ways over the years. The traditional two person method of pumping the pedal; various one man systems such as vacuum pumps or valves. So far I had found the vacuum pump system the best. However I had ruined two vacuum pumps […]

W126 brake hose replacement

I’ve been meaning to change the brake hoses on the 300SE for a while. I have no history for the car, so I don’t know how old they are. As I also wanted to change the brake fluid, I thought it made sense to do both jobs at the same time. I had noticed a slight pull to one side on hard breaking. It may not have anything to do with the hoses, but they are a good place to start. Brake fluid really should be changed ever two years. Most people don’t do it that frequently, but regular changes […]

300SE fuel pump replacement

When inspecting the SLS in my 300SE, I noticed that the fuel pump was seeping fuel. It wasn’t enough to smell fuel, so I am not sure how long it had been like that. I’ve owned the 300SE for about four and half years and have not done the fuel pump replacement job.

As I keep a spare Bosch fuel pump and filter, I figured I should change it ASAP. In my view, it makes little sense to change out the pump and not do the filter at the same time. I changed the filter when I did the […]

W126 Self-leveling suspension adjustment

On a recent drive with a few friends I noticed my 560SEC was sitting a bit low at the rear. I had it parked next to a 380SEC, which I am pretty confident is at the correct height, and my car was lower. Based on that, I started reading through the section on W126 self-leveling suspension adjustment to work out why.

The length of the control rod that links the height corrector to the sway bar impacts the ride height. However, the manual is quite clear that this adjustment is not there to compensate for the standard ride height (without […]

W126 front window regulator

Back a few weeks ago I identified the problems with my power window was the W126 front window regulator. In particular, the passengers side front. The regulator was missing some teeth. I had bought a new one some weeks ago, but the regulator was in the shipment that FedEx lost. I went with a VDO regulator as I expected it to be higher quality than a Meyle unit.

Due to the lost parcel, I had been driving around with the door card removed for weeks. I was rather pleased to see the box arrive yesterday. The new regulator looked identical […]

W126 Outside temperature LCD screen repair

For the first time since I have owned the car, my 300SE has a working outside temperature display. Not only is it a useful feature of the car, but these small fixes can make the difference between the car seeming nice or a bit of a jalopy.

The W126 Outside temperature LCD repair is really easy. It should be on the radar of any W126 (or W124) owner who has a failing outside temperature display. It only took 30 minutes and is very easy. Even better, the LCD illumination works when the headlights are on, when I thought it was […]

Bad W126 window regulator

Another long standing to-do list item on my 300SE was the passengers side window. Over time, the window would slip down so there was half a centimeter gap at the top. It would also make a clunking sound at the top of the window travel.

I had purchased a good used W126 window regulator a couple of years back. Yesterday I decided to try and fit the regulator. To get to the W126 window regulator, the door card must be removed. To do so, there a few screws holding it in place. Two holding the little chrome embellisher near the […]

300SE cowl drains

Last year, while I was fitting the monovalve elimination kit to my 560SEC, I cleaned the drains under the cowl covers. I also fitted a new upper seal and new shaft seals for the windscreen wipers. The condition of those seals was even worse on the 300SE, so today I finally got around to doing the same job on that car.

I was especially keen to do this on my 300SE as water would get into the passengers foot well in the rain. This would only happen when the car was parked nose up on an incline. My theory was […]

W126 Outside temperature LCD screen repair attempt 1

The W126 outside temperature display was standard in all Australian delivered series 2 models. The little LCD screen is not really compatible with the Australian sun as most of them start to bleed and become unreadable. My 300SE and 560SEC both have unreadable LCD screens. The 560SEL, which was garaged all its life still has a good screen.

Buying a used one is not really a good option. They are not particularly cheap, and even if a cheaper one from the USA can be sourced, it would be in Fahrenheit. There is somebody in Europe who is selling replacement LCD […]

W126 Radio and USB sockets

When I bought my 300SE about four years ago, it came with an early 2000s era Kenwood CD player. At the time, I assumed I would need to replace it, as it wasn’t working. Turned out the plug had come out of the back and it actually worked fine. It wasn’t a bad unit, as it could play MP3 CDs, display track information and so on. My main problem with this radio was that it would occasionally cut out, and only work again if I removed and plugged the face back in. The W126 radio is a DIN unit, so […]