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 […]

450SLC Battery tray

I had not driven my 450SLC since early march due to the COVID19 lockdown. When I first started the car the battery seemed quite weak. After a drive, I put the car on my Ctek charger. The charger showed an error where the battery will would not hold a charge. This was confirmed by my Solar battery tester. The recondition mode helped a bit, but ultimately the battery is almost 8 years old.

I probably would have tried a bit harder with the reconditioning if it wasn’t for a 30% off sale on DIN batteries at Supercheap auto. It seemed […]

450SLC Dragging rear brakes – part 3

In part 2, I had been struggling with my new SLC rear Calipers. As outlined in that section, the new calipers I had on hand are for models not equipped with the anti-squat rear suspension. This was because USA models were not so equipped. The hard lines were too short to fit properly and fouled on the suspension bump stops. I dropped the car off earlier in the week to have new hard lines made up that fit, and to change the flexible hoses.

I have since found out that I made a pretty stupid mistake. Instead of checking the […]

450SLC Dragging rear brakes – part 2

A couple of weeks ago I started investigating the dragging brakes on my SLC. I found both of my rear calipers had been overheated and were in poor condition. I ordered a set of rear calipers, and decided to change the rotors too. Mine were still in spec, but on the lower end. The hoses I had purchased last time were also not right. I needed hoses with two female ends but the other hoses were male/female.

The first thing I found was that it was quite hard to remove the old rotors. Not only were the rotors rusted […]

450SLC Dragging rear brakes – part 1

For the last couple of years I have noticed a noise from the rear of the 450SLC while driving. At first I thought it might be a wheel bearing or some kind of bushing. I mentioned it to my mechanic and he took and look and it wasn’t any of those things.

Last time I took the car on a longer drive, the noise was getting worse, and I noticed after I returned the rear wheels were hot to the touch. Too hot to touch. I realized that my noise had been dragging rear brakes all along.

Both sides were […]

The 450SLC hits 300,000km

This evening I took my 450SLC for a drive up the old Pacific Highway. I wanted to check the impact of re-connecting the vacuum advance on the distributor. I had discovered the line was broken when doing some maintenance. With the advance enabled, mid throttle response seems a lot better. I do get a little pinging when cruising on the motorway, so I am going to try 98 instead of 95.

During the drive, the SLC reached a big milestone:

That’s right, the SLC has finally reached 300,000km. I purchased the car in 2003 with 262,000km showing. As there […]

New alloy wheels for the 450SLC

My 450SLC was originally sold with 14″ alloy wheels. This style of wheel was the standard Mercedes alloy wheel from the late 60s to 1985. It has a few nicknames such as Bundt Cake, Baroque, Fuchs etc. On the V8s it is 6.5″ wide but narrower versions (5.5″ & 6″) were available. The challenge with these wheels is that good tyres for a heavy car like an SLC are now hard to find. They are also hard to keep clean and I find the 195/70 tyres too litle for a car like the SLC.

When I moved back from the […]

W107 windscreen washer pump

The windscreen washer has not been working on my 450SLC for a couple of months. The wipers started up, but no water squirted on the windscreen. On quick inspection, I assumed it was the pump as it was rather rusty. The W107 windscreen washer pump is a poor design in my view. It appears that the motor is below where the water is sucked in, so any minor leakage gets into the mechanism and it rusts out.

Since I purchased the car in 2003, I am now on my 3rd pump. They are not expensive, at around $60, but […]

My Mercedes Collection

My Mercedes collection after giving them a quick wash. A representative from the 60s, 70s and 80s.

Mounting NSW Historic plates

NSW has a great historic registration system. It allows for classics to be used for 60 days on a logbook for a drastically reduced fee. For unknown reasons the plates issued are tiny plates with purple numerals. The plates are so small they are not wide enough for the mounting holes on most cars. As these plates don’t end up on some disposable SUV where new holes can simply be drilled, a mounting plate is required. On the 250SE and Traction Avant, I fabricated my own mounting plates out of sheet aluminium. I didn’t have time to do this for […]