Mercedes GL450 120k Maintenance

 The GL450 is now past 120k miles (123k) and due for a few maintenance items.  I recently replaced the front brake pads for the first time.  My E350 also went 120k before needing front pads.  Here are the new versus old pads showing wear.

I let them go long enough it also took out the wear sensor (which is cheap to replace).

I replaced the spark plugs too.  This required a special 14mm thin-wall 12-point wobble socket.  

When working on a Mercedes, you will need a set of reverse torx sockets and wrenches too. 

I also replaced the accessory belt. 

The belt appeared to be in great condition.  No cracks or visible wear at all.  My E350 belt was like that too.  But at 120k miles it seems like a good idea to just replace it anyway as they are not expensive, even through Mercedes.

As I was replacing the belt, I broke 2 plastic coolant tubes.

Overflow Tube

These were about $130 each and in stock at the local dealer since they often get broken.  The overflow tube in the bottom photo broke very easily.  

I change the oil using the oil reminder in the display.

2013 GL450 versus 2020 GLS450

 

Our 2013 GL450 when we bought it in 2018

We bought this Mercedes GL450 back in 2018 with 64k miles on it.  We now have 123k miles on it.  With the high cost of fuel, and time for some maintenance, we decided to look at options.  First we considered getting an electric car.  We settled on the Tesla S and drove several.  We almost bought a really nice red 2018 but decided the added cost of insurance, tabs, etc., and parking space just was not worth it.  So we decided to consider replacing the GL450 with something newer and more economical.  We also wanted lighter color interior as ours is black and it gets hot in the sun.   We drove a 2019 Mercedes GLC350e plug-in hybrid.  I liked it but Kelly preferred the GL450 we had to it.  The 2020 and up GLS450 has mild hybrid and a smaller 3.0L I6 engine that is rated at the same 362HP as our GL450 which has a 4.6L twin-turbo V8.  It claims 5mpg better in town and 4MPG better on the highway.  I found a 2020 GLS 450 with 33k miles on it at the local Mercedes dealer so we drove it.  Very disappointing actually compared to our 123k mile 9 year old GL450.  Ours drives smoother, has significantly more acceleration and delivers it much smoother, and has a better feel to it.  So, we will be keeping our 2103 GL450 for a while more.  I suppose we will eventually need to replace it but not in the near future.  Below are some photos of the 2020 GLS450 we drove.  

There were some really nice features in the newer model.  I like the instrument cluster (LCD screen really) and the much larger navigation screen and better navigation, and Android Auto.  I liked the mild hybrid but it did not seem to add much other than useful start/stop where the accessories remain working including the AC compressor.   Honestly, that was about it.  I am disappointed with this GLS450 being the replacement for our GL450.  It does not feel like a step up in some of the most important ways.    

Tighten a loose freewheel on the trail

 I have had bicycle freewheels come loose while riding, many times and on multiple bikes.  Here is a video showing it.

You start to hear and feel a knock, worse in some gears that others.  As it progresses, it may struggle when changing gears.  If you let is continue, it will come apart and leave your stranded.  

Maybe I am the only one that seems to have this problem but I doubt it.  The first time this happened I was out in the desert up a long hill.  I felt it happening but did not stop to check into it.  It finally got so bad the freewheel came apart and locked so there was no ratchet action anymore and the pedals just followed the wheel.  It made for a long trip home.  My bike was under warranty so I got a whole new rear wheel assembly.  The new one did the same thing.  This time I caught it early.  Normally you need to take the wheel off and use a special spanner for this.  I only had some basic tools I carry on the bike.  I finally used a Philips screwdriver and some ingenuity to tighten it back up without taking anything apart.    

Here is a photo showing the freewheel off the bike so you can see how to place the screwdriver.

There are small holes for the spanner. Push the Philips screwdriver into that hole at a bit of an angle. Since the bike will be assembled on the trail, there are only a few areas where you can even see this part of the freewheel.  Generally in the slot where the axle bolts to the frame.  While pushing in hard on the screwdriver, rotate the wheel in the forward travel direction.  This will cause the whole freewheel to move with the wheel but since you are holding the freewheel nut with the screwdriver it will stop against the frame and tighten the nut.  Since you have the leverage of the whole wheel diameter, the weak point of this is keeping that screwdriver held tight into the nut hole.  You can help this by holding the screwdriver at a bit of angle.  Hard to explain in words but it works well.  

The freewheel bearing preload is set with shims, not a specific torque, so you really can't overtighten it, especially since the screwdriver approach does not give enough grip to overtighten it.  

SEMA 2022

 

Like last year, I attended SEMA 2022 for the Friday Experience.  This is a great opportunity open to the public.  Also like last year, I wanted to see what the industry is embracing going forward with the rapid change to electrification going on at the OEMs.  

When I entered the Las Vegas Convention Center, the line was very long.  It was at a different place than last year making the comparison a bit harder but it sure seemed like more people this year.  

This years SEMA Electrified was much larger than last years. In addition, there were manufacturers of EV components and kits all over the show.  Below are some photos of several EV systems and components I found at the show.

A Porsche 911 specific kit.

There were many other EV conversion suppliers here.  There were also many EV conversions on display around the show.

Absent was any hybrid conversion parts or kits.  A person could of course use many of the components such and controllers, batteries, chargers, etc., in a hybrid system but what is missing and needed are hybrid motors.  In my opinion this is a gap.  Of course there are many people interested in full-EV conversion which is a niche market itself but there is another niche for hybrids that is mostly unserved.  From what I can tell, Vonnen has this market to itself at the moment.  The Vonnen system is not available as a kit and it is priced very high, well out of reach of most.  

As I wrote years ago, I believe there is room for aftermarket performance hybridization kits.  SEMA would be the place to find this and I saw nothing.  However, the expansion of EV components and kits are paving the way for hybrids as well.  

Obviously SEMA is a huge show with tons of other performance systems, tools, shop equipment, and other suppliers that offer components and services to shops.  There is also a huge display of all kinds of exotics contraptions that take up the whole convention center parking lot.

This is not just a photo angle thing.  The bumper was actually the height of my head standing straight up.

I saw several similar to this.  A mini monster truck.  This one had a supercharged GM LS V8 in it, as I think most did.  

Notice the smoke coming from the top right in the photo above.  That was a drift area where they were shredding tires all day long.  

New Ford Broncos were very popular at the show.  Many selling components and kits and others doing major modifications like this one above.