2020 GLC 63S - Australian Spec
I have ordered 2020 GLC 63S Coupe here in Sydney, Australia and got a build date of 24th July 2020. I'm little worried when it comes to cars getting build after 1st July 2020, as with new EU emission norms coming into play from 1st July 2020 for co2 and sound emissions, would it impact cars coming to Australia as well.
Reason for my concern for Australian cars is as they have UK compliant exhaust system, so if mercedes amg has to comply from 1st July, it would mean cars getting built after 1st July will have further reduced sound.
And my main reason to buy glc63s was because of the V8 sound.
What do you guys think? Would it impact Australian cars or I'm just thinking too much.
Thanks.
I was aware of the WLTP regs which I believe applied to cars from 2019 onwards but didn't know about additional EU regs coming into effect from 1 July so I can't really comment on that. I'll take a guess and say that given new cars receive software updates over the air automatically, if the laws apply retrospectively (not sure?) that could mean pre-1 July 2020 cars might get an update to comply with the new regs as well? Who knows.
At the end of the day though, as long as the car doesn't have an OPF (which it shouldn't) you can probably get all the pops and bangs you want via an ECU tune if you feel it is lacking from factory. I recently took delivery of an Australian spec GLC 43 and the thing pops and cracks plenty once break-in is complete. I also recently fitted an exhaust valve module to keep the flaps 100% open and that has made it pretty loud and aggressive...
I was aware of the WLTP regs which I believe applied to cars from 2019 onwards but didn't know about additional EU regs coming into effect from 1 July so I can't really comment on that. I'll take a guess and say that given new cars receive software updates over the air automatically, if the laws apply retrospectively (not sure?) that could mean pre-1 July 2020 cars might get an update to comply with the new regs as well? Who knows.
At the end of the day though, as long as the car doesn't have an OPF (which it shouldn't) you can probably get all the pops and bangs you want via an ECU tune if you feel it is lacking from factory. I recently took delivery of an Australian spec GLC 43 and the thing pops and cracks plenty once break-in is complete. I also recently fitted an exhaust valve module to keep the flaps 100% open and that has made it pretty loud and aggressive...
From what I've read in a few articles, most manufacturers have started to add GPF to their cars in most markets around the world, as it'd would be difficult to prepare different exhaust system for different markets. Like mercedes introduced in all of their A45 models and Volkswagen group adding to all their cars around the world.
So, from look of it they already added to all GLC models when it was revised last year (around the same time when new A45 was released) plus with new Wltp regulations coming into play last year,
facelifted cars are quiter than pre-facelift.
And new phase of regulations going live on 1st July, might impact the sound more.
I still like the sound of the facelift one, so went ahead and booked one but wouldn't want it's sound getting reduced even further.
Also, with new regulations, they are reducing the decibels that exhaust are making and with further reducing the Co2, which might make it more quieter.
Exhaust valve module would be a good add to make the exhaust sound powerful all the time, wasn't aware about this.
From what I can see, there aren't any OPFs fitted which I believe are similar in size to the cats and have sensors attached to detect blockages and thus prompt higher gas temperatures to burn it off. I could be wrong though as they might have integrated the OPFs within the cats themselves...
At least from the standpoint of the GLC43 there was a massive difference between the pre-facelift and post because I believe the performance exhaust was only made an option for the facelift car which is why it probably sounds so much better. That said, yes for the facelift 63 it would not sound as aggressive compared to the pre-facelift whether that be due to software changes, possible OPFs or a combination of the two...!
From what I can see, there aren't any OPFs fitted which I believe are similar in size to the cats and have sensors attached to detect blockages and thus prompt higher gas temperatures to burn it off. I could be wrong though as they might have integrated the OPFs within the cats themselves...
At least from the standpoint of the GLC43 there was a massive difference between the pre-facelift and post because I believe the performance exhaust was only made an option for the facelift car which is why it probably sounds so much better. That said, yes for the facelift 63 it would not sound as aggressive compared to the pre-facelift whether that be due to software changes, possible OPFs or a combination of the two...!
Amazing colour, my current GLC 250d is of same colour and opting for the same colour in the new one as well.
It gives me a bit of relief seeing they are no visible GPFs installed. So, hopefully my car should also arrive with similar exhaust. Hoping for the best.
May I ask from where you ordered exhaust valve module and did you installed it by yourself?
Thanks.
Last edited by Kariznin; Jun 15, 2020 at 07:44 AM.
The Australian distributor is David from https://europerformance.com.au/. His email is david@europerformance.com.au. He will also double check your VIN to confirm the correct module.
It is very easy to install. All you do is unplug the stock wiring harness at the valves and connect the module wires in-line (one end to the valve, the other into the stock wiring harness). You do this for both valves. The module itself just sits in the boot near the fuse box and to get the wires from the boot to the exhausts I just fed them through an existing rubber grommet which contained some factory wires. Here are some pictures for reference: https://imgur.com/gallery/fdIrtrD
Probably took me an hour to install and you don't need to jack up the car or anything - I managed to slide just far enough underneath.
The Australian distributor is David from https://europerformance.com.au/. His email is david@europerformance.com.au. He will also double check your VIN to confirm the correct module.
It is very easy to install. All you do is unplug the stock wiring harness at the valves and connect the module wires in-line (one end to the valve, the other into the stock wiring harness). You do this for both valves. The module itself just sits in the boot near the fuse box and to get the wires from the boot to the exhausts I just fed them through an existing rubber grommet which contained some factory wires. Here are some pictures for reference: https://imgur.com/gallery/fdIrtrD
Probably took me an hour to install and you don't need to jack up the car or anything - I managed to slide just far enough underneath.
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Also an Aussie here...
do you know if the 2020 glc63s has secondary cats that can be deleted? I’ve stuck my head under the car and can’t see any cats or resonators. My view is obstructed though by the cover/bracket about 3/4 of the way down the car. On c63 forums I think they suggest there are no deletable secondary cats.
thanks for your thoughts
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I thought the performance exhaust on both the 43 and 63S were the same but they must be different if you can't see a resonator. In any case, from these pictures I don't believe there are any secondary cats however I am not sure what the thing (below the cats and before the resonator) is.
You could always do something a bit rudimentary and tie a long piece of string to your phone, set it to record video with flashlight on, and drag it underneath the car to get some footage.
I've been doing some digging: https://www.mboemparts.com/v-2020-me...ust-components
On this American MB parts catalogue it looks like the cats are on the downpipe. The midpipe piece looks like it is literally just pipe, no cats or res. So if I want to delete the secondary cats, it might be a tricky job for the exhaust shop, but I guess I'll just have to see what their opinion is. I like that valve mod you did btw. I might follow suit.
Regards
Matt
The exhaust valve module does open up the sound a bit more and would be my first preference before doing permanent/semi-permanent changes to the exhaust system. After that, if I wanted more sound I'd probably then go for an ECU tune with added burbles/cracks and potentially new downpipes with either high flow cats or none at all. Just be mindful of your insurance as most PDS's will probably exclude coverage for vehicles modified illegally (which removing the cats would be).
The exhaust valve module does open up the sound a bit more and would be my first preference before doing permanent/semi-permanent changes to the exhaust system. After that, if I wanted more sound I'd probably then go for an ECU tune with added burbles/cracks and potentially new downpipes with either high flow cats or none at all. Just be mindful of your insurance as most PDS's will probably exclude coverage for vehicles modified illegally (which removing the cats would be).
I have ordered 2020 GLC 63S Coupe here in Sydney, Australia and got a build date of 24th July 2020. I'm little worried when it comes to cars getting build after 1st July 2020, as with new EU emission norms coming into play from 1st July 2020 for co2 and sound emissions, would it impact cars coming to Australia as well.
Reason for my concern for Australian cars is as they have UK compliant exhaust system, so if mercedes amg has to comply from 1st July, it would mean cars getting built after 1st July will have further reduced sound.
And my main reason to buy glc63s was because of the V8 sound.
What do you guys think? Would it impact Australian cars or I'm just thinking too much.
Thanks.
I'm very much satisfied by the sound of my car's exhaust. Though I feel, it had a little more in comfort mode but that's same with all similar stock cars everywhere.
Last edited by Kariznin; Jan 16, 2022 at 12:41 AM.
I'm very much satisfied by the sound of my car's exhaust. Though I feel, it had a little more in comfort mode but that's same with all similar stock cars everywhere.


