Aircon issue - R744 gas (2025)

AMGeed said:

If the temperature is set to 22c and the a/c is not blowing cold, its probably because the ambient temperature is nowhere near 22c.
On a warm day, try turning the temperature down to 15/16c and you should find the a/c blows cols as it should.

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Thanks - I wasn't expecting cold when set@22 deg. It's when I turned down to 16 and then Lo it hasn't been cold until today.

An aircon specialist may be a good bet, they can use dye to check for leaks etc.

You are near me if you use Colchester, I hear Kool Runnins are good aircon specialists:-

Kool-runnins.co.uk

07506 664331

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sl500amgsport said:

An aircon specialist may be a good bet, they can use dye to check for leaks etc.

You are near me if you use Colchester, I hear Kool Runnins are good aircon specialists:-

Kool-runnins.co.uk

07506 664331

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Thanks - I found a place in Benfleet - booked in on Thursday next week

such said:

MB Colchester got back to me just after I made this booking - cost of R744 service £120+vat. Had to confirm this price was correct and it is!
Booked in for next week.

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Is that to convert or simply service using older refrigerant?

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sl500amgsport said:

Is that to convert or simply service using older refrigerant?

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That's an aircon service using R744

update from MB Colchester:

We have also investigated the leak in the aircon, Check system and confirmed aircon not working, fit charger and diagnostic kit and run quick test, low gas pressure, regaled system and tested, found leak on pipe but even after regas the compressor performance is very poor, suspect lack of gas has damaged aircon compressor. We need to replace aircon compressor and both pipes to compressor and retest system. Unable to complete testing without running system at full pressure and this is not possible due to bad compressor performance. Aircon compressor and both pipes need replacing would need replacing for a cost of £3,862.56.

such said:

update from MB Colchester:

We have also investigated the leak in the aircon, Check system and confirmed aircon not working, fit charger and diagnostic kit and run quick test, low gas pressure, regaled system and tested, found leak on pipe but even after regas the compressor performance is very poor, suspect lack of gas has damaged aircon compressor. We need to replace aircon compressor and both pipes to compressor and retest system. Unable to complete testing without running system at full pressure and this is not possible due to bad compressor performance. Aircon compressor and both pipes need replacing would need replacing for a cost of £3,862.56.

Click to expand...

Bargain

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I'd be inclined to get an a/c compressor from Autodoc, the a/c pipes from the dealer and get an indy to fit it and recharge the a/c. Got to be cheaper than main dealer.
Enter your car details into this link for a price. Nissens and Denso are both recommended brands.

such said:

update from MB Colchester:

We have also investigated the leak in the aircon, Check system and confirmed aircon not working, fit charger and diagnostic kit and run quick test, low gas pressure, regaled system and tested, found leak on pipe but even after regas the compressor performance is very poor, suspect lack of gas has damaged aircon compressor. We need to replace aircon compressor and both pipes to compressor and retest system. Unable to complete testing without running system at full pressure and this is not possible due to bad compressor performance. Aircon compressor and both pipes need replacing would need replacing for a cost of £3,862.56.

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Plenty of independent specialists out there who will repair for a fraction of that cost.

Contact

Kool-runnins.co.uk

07506 664331

sl500amgsport said:

Plenty of independent specialists out there who will repair for a fraction of that cost.

Contact

Kool-runnins.co.uk

07506 664331

Click to expand...

He doesn't do R744 gas Tx

AMGeed said:

I'd be inclined to get an a/c compressor from Autodoc, the a/c pipes from the dealer and get an indy to fit it and recharge the a/c. Got to be cheaper than main dealer.
Enter your car details into this link for a price. Nissens and Denso are both recommended brands.

https://www.autodoc.co.uk/car-parts/compressor-parts-10454/mercedes-benz/e-class/e-class-w212/31051-e-350-cdi-212-025?criteria%5B122%5D%5B%5D=MERCEDES-BENZ&categories%5B%5D=447&supplier%5B%5D=123&supplier%5B%5D=66

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Nothing in stock for part no A0008300004

such said:

He doesn't do R744 gas Tx

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Oh then you need Bon Air -
01268 756 650

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sl500amgsport said:

Oh then you need Bon Air -
01268 756 650

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Thanks - they were initially my first port of call but I cancelled them as they were £300 for service vs £160ish MB. I'll let the supplying dealer where I bought the car from sort it, as it's only 1 month since purchase and this was noted at point of sale.

such said:

update from MB Colchester:

We have also investigated the leak in the aircon, Check system and confirmed aircon not working, fit charger and diagnostic kit and run quick test, low gas pressure, regaled system and tested, found leak on pipe but even after regas the compressor performance is very poor, suspect lack of gas has damaged aircon compressor. We need to replace aircon compressor and both pipes to compressor and retest system. Unable to complete testing without running system at full pressure and this is not possible due to bad compressor performance. Aircon compressor and both pipes need replacing would need replacing for a cost of £3,862.56.

Click to expand...

That's what happens to cars when people don't use the air con, if you get it fixed, leave it on permanently.

such said:

Thanks - they were initially my first port of call but I cancelled them as they were £300 for service vs £160ish MB. I'll let the supplying dealer where I bought the car from sort it, as it's only 1 month since purchase and this was noted at point of sale.

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Wow yes statutory warranty would apply with right to reject if they don't play ball!

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rf065 said:

That's what happens to cars when people don't use the air con, if you get it fixed, leave it on permanently.

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I always have it on, only ever needed to get my W212 re-gassed once in 8 years.