W126 low pressure hydraulic hoses

My 560SEC has been leaking from the power steering and self leveling suspension. In both cases, it is obvious that (at least some) of the leakage is coming from the low pressure hydraulic hoses. It is possible there are additional leaks in the steering, but fixing this obvious one is a good place to start.

I had looked at doing this job a couple of months ago. I quickly saw it was quite fiddly and as I was planning to use the car the next day, I decided to put it off. Once I realized I would be removing the […]

W126 radiator removal

As part of the work I have been doing to the 560SEC, I have removed the radiator. The radiator was leaking from the top tank and appeared to be original. It was an IMI unit which was one of the OE suppliers and had a 1987 date code on it. W126 radiator removal is fairly straightforward.

Fist step is obviously draining the coolant, and there is a drain valve at the bottom of the radiator. The coolant will drain must faster if the radiator cap is off. I am really happy with how clean the coolant is, and how little […]

W126 Monovalve eliminator – part 2

My 560SEC had been leaking coolant and giving me heat when I didn’t want it. Last week I started the repairs for these problems. As the Bosch and Mercedes W126 Monovalve repair kit was no longer available, I have been installing the Klima Design Works monovalve elimination kit.

In the first part I removed the W126 monovalve, auxiliary water pump and other hoses. This gave me the room to give the area underneath the heater hoses a good clean. There were some leaves and other detritus. Its important to remove this stuff it can cause rust. The mud stays wet […]

W126 Monovalve eliminator – part 1

My 560SEC has been having a couple of problems with its cooling system. Coolant has been weeping out of the top tank of the radiator. In addition, the monovalve has failed, causing unwanted heating at idle. The radiator looks either original or replaced very early in the cars life. As these radiators have plastic tanks, I have purchased a new one to replace it.

It used to be possible to purchase a monovalve repair kit from Mercedes or Bosch. The supply of these has now dried up. There is a kit from a company called MTC but all the Mercedes […]

July and August Night Drives

I’m a member of a few different car clubs (Mercedes, Jaguar, Citroen), but am rarely able to make events. With a young family the times rarely work for me. A lot of the time I spend either working on or driving my cars is late at night. I figured I am not the only one in this situation, so after a poll of a few friends from the Mercedes club, we have started up a monthly night drive.

Not only is driving at night more convenient for me, but the traffic is greatly reduced, especially cyclists. Obviously you have to […]

R/C107 Differential Ratios

The R/C107 models had an extremely long production run – 18 years. There were a variety of different models and specification changes. This included the differential ratios that can have a big impact on the performance and economy of the vehicle.

In compiling the table below, I have tried to research the various country specific variants. It is possible I have missed a few. Please indicate in the comments below if that is the case.

The SL and SLC of the year had the same mechanical specification (at least during the SLCs production run). The only exception was the 450SLC […]

Mercedes-Benz Australia price list – April 1982

In April 1982 Mercedes-Benz was pretty much king of the hill when it came to mainstream luxury cars. Rolls Royce was in a league of its own, and Jaguar was at its quality nadir. BMW were just releasing the E30 which would propel them to a leadership position in the small, luxury market. They still could not touch Mercedes-Benz in the mid or upper tiers.

As a result, Mercedes were able to charge premium prices for their offerings. This was before the introduction of fringe benefits tax in Australia, so many of these cars were purchased as company cars with […]

Yorkstar Motors – December 1969 Price List

I recently came across a price list from Yorkstar Motors, dated December 1969. Yorkstar motors were at that time the main dealer in Sydney and I think they had something to do with the overall importation of the cars. This era Australian delivery cars have a Yorkstar motors tag on them regardless of where they were sold.

Unlike in later years, nearly the whole range was offered in 1969. It was only have the ADR regime became stricter in the mid 60s that Mercedes-Benz started to limit the vehicles they offered in Australia. This was probably due to the cost […]

MBCNSW Drive to Bilpin

Today I joined an event with the MBCNSW for a drive to Bilpin. Bilpin is to the West of Sydney and is half way up the Blue Mountains. It is know for its Apples. The purpose of the drive was to raise money for one of our club members, Sam. Sam is the proprietor of the Bilpin Apple Pie Cottage, our destination. He suffered quite a loss during the big fires last summer, losing buildings and part of his stock. It was then a long time before he could start trading again due to clean up. Finally, when things were […]

Replacing CIS injectors on my 450SLC

This week I replaced the CIS injectors and the spark plugs in my 450SLC and the car is running much better for it.

I’ve been thinking about swapping the fuel injectors in the SLC for a while now. When cold, the car wouldn’t run that well at first and you would need to blip the throttle a few times to get the idle to settle down. This can be a sign that some of the injectors are not atomizing the fuel properly. The car is less sensitive to this as it warms up, but proper atomization is important for smooth […]