Tag: maintenance

Mercedes CLS55 AMG W219, Replacing the 722.6 Gearbox Conductor Plate & Transmission Fluid Refresh

As part of the big preventative maintenance, I swapped out the conductor plate for the 5-speed 722.6 automatic torque converter gearbox (which is pretty much bulletproof) and also did a fluid refresh. Its almost impossible to get all the fluid out, that is done better with a flush (done with specialist equipment).

10 liters of LiquiMoly Top Tec 1800 ATF fluid
Febi Bilstein Transmission service kit (gasket, filter, bolts, drain plug, copper washer, connector)
New conductor plate
New conductor plate
Valve body & old conductor plate. See the black residue, time for some cleaning
More of that black residue…
New conductor plate fitted, cleaned the valve body as much as possible
Valvebody back in place, new filter mounted

I replaced almost 6 liters, the rest remains in the system off course in the coolers and the rest of the transmission plumbing. Maybe somewhere next year do this again, but also replace all/some solenoids and go to a transmission specialist.

Pro tip: Transmission adaptation reset is mandatory! I used method 2 of the video below




Mercedes CLS55 AMG W219, Ball Joint Special Tool

As preparation of refrshing the front suspension, I bought the special tool to press out (and in) the ball joints which are housed in the knuckle on the W211/W219 platform.




Mercedes CLS55 AMG W219, Replacing Roof Window Trim

The roof window trim had seen beter days. On both sides, the “curtains” were torn, which is something that annoyed me very much as the CLS is a luxury car.

Bought 2 new trim pieces from Mercedes, they were quite easy to replace. Start from the outside of the car with the window tilted. You should then be able to lift out the trim pieces and then continue from the inside. On the front of the roof window, a hard plastic piece keeps the trimpieces in place with a small notch.

Looks way better after replacing it!

Partnrs: 2157801540 / A2157801540
Partnrs: 2157801640 / A2157801640

New (top) vs old & torn (bottom)
End result!



Mercedes CLS55 AMG W219, Repairing The Airmatic Compressor to Valveblock Airline

My MacGuyver method for repairing the airline did not hold out very long, so I needed something structurally. Fortunately, Mercedes sells a piece of airline (1.5m) for repairing/maintaining the Airmatic system, which was exactly what I needed.

Partnr: 2203271045 / A2203271045
Costs: about 20 euro

MacGuyver vs new airline. I used some teflon tape for extra safety
I found some hose which fitted around the airline perfectly (also for extra safety against rubbing)



Mercedes CLS55 AMG W219, Leaking Rocker Cover Gasket (Again)

Last time I will be using gaskets from Febi Bilstein as the rocker cover started leaking again around cilinder 4. Replaced it with a Viktor Reinz gasket. If it will leak again, I will buy them from the Mercedes dealer.

Leak from cilinder 4 onto the exhaust manifold
Cleaned surfaces before gasket installation
New gasket in place



Mercedes CLS55 AMG W219, Replacing The Engine Mounts With Meyle Mounts

As part of further preventative maintenance, I replaced both the engine mounts with fresh new Meyle engine mounts. Unfortunately no HD version available. Next time I will probably replace them with Mercedes Black Series mounts, as these are a popular upgrade.

It’s highly recommended to replace them, as it makes a major difference!

Location of the engine mount (another one on the other side of the engine)
New mounts with the covers
Meyle (new) on the left and old on the right. I almost thought that I ordered the wrong ones as there was a clear height difference. But they sag over time, so that is to be expected.
Its highly recommended to have this tool ready as this makes it a lot easier to undo the top nut!



Mercedes CLS55 AMG W219, Replacing The Supercharger Idler Pulley

I noticed that the supercharger idler pulley had quite some dirt accumulation on it and also felt a bit of play, so decided to replace it with a new pulley. I made the right decision as the grease was escaping and therefore attracting the dirt.

Runs smooth again with the new pulley. When I will upgrade with billet pulleys, I will also replace the tensioner itself.

Old (+dirty) and new pulley



Mercedes CLS55 AMG W219, Solving AirMatic Issues

I was suprised with this look, which is a horror type of situation for every CLS owner with Airmatic suspension. In the end I tracked the issue down to a leaking compressor air line (to the valve body), which solved the issue.




Mercedes CLS55 AMG W219, Replacing The Power Steering Reservoir & Fluid

The power steering reservoir on the W211 & W219 platform have a filter built in. This filter is not serviceable, meaning that you need to replace the reservoir if you also want to replace the filter.

I took the liberty to replace the reservoir/filter and also flush the complete system and put fresh new synthetic oil in.

I used a vacuumpump to get most of the old red mineral fluid out. Then replaced the reservoir and used the “lock-to-lock” steering motion to pump all the old fluid out. Temporarily cap off the return line on the new reservoir and extend the return line to any suitable container for the old fluid.

I used about 2 liters to flush the system and 1 liter to fill the system. Febi Bilstein CHF 11-S Nr. 06161 is the correct fluid for this system.

Steering goes noticeably lighter after this service!

Old fluid coming out
Almost done flushing (fluid is becoming more green/blue-ish)
Made this shot after removing the reservoir. It clearly shows why replacing the serpentine belt is a bit of a hassle there…



Mercedes CLS55 AMG W219, Servicing The Supercharger Oil

One of the most common overlooked service items, is replacing the supercharger oil. The gears of the supercharger spin very fast and need proper lubrication and cooling. Because it spins so fast, it requires a special type of oil: Mobil Jet Oil II (Synthetic Jet Engine Oil).

This oil is not that widely available to customers and also not very cheap. I used a 150ml syringe with some hose to extract the oil and fill it up again. It holds 150ml maximum, but you can never get all the oil out unless you remove the supercharger. I removed about 130ml, and put back the same amount in fresh oil.

Extracting the old oil
Used a plastic containter to hold the oil in, which makes it a lot easier