2024 GLC 300 weak a/c
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Joined: Sep 2016
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From: TX
2023 GLE3502W, 2024 GLC3002W, 1967 Pontiac GTO 4 sp (sold...sniff)
2024 GLC 300 weak a/c
This is our 4th MB since 2017, but it's the first new one. The car sat in the sun today for 2.5 hours, with a sunscreen across the windshield. After starting the a/c took longer to cool down the cabin than our previous MB's. Also I could put a finger in a vent and hold it there without it getting too cold. Usually on auto the fan begins to slow down as the cabin temp reaches the setting. Never happened. Outside temp was 90. I am I too fussy or paranoid. BTW I scrolled through this entire forum but so no previous reference to this problem. Any ideas? Thanks.
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Joined: Dec 2019
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This is our 4th MB since 2017, but it's the first new one. The car sat in the sun today for 2.5 hours, with a sunscreen across the windshield. After starting the a/c took longer to cool down the cabin than our previous MB's. Also I could put a finger in a vent and hold it there without it getting too cold. Usually on auto the fan begins to slow down as the cabin temp reaches the setting. Never happened. Outside temp was 90. I am I too fussy or paranoid. BTW I scrolled through this entire forum but so no previous reference to this problem. Any ideas? Thanks.
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Joined: Dec 2023
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2024 GLC300 2025 E450
This is our 4th MB since 2017, but it's the first new one. The car sat in the sun today for 2.5 hours, with a sunscreen across the windshield. After starting the a/c took longer to cool down the cabin than our previous MB's. Also I could put a finger in a vent and hold it there without it getting too cold. Usually on auto the fan begins to slow down as the cabin temp reaches the setting. Never happened. Outside temp was 90. I am I too fussy or paranoid. BTW I scrolled through this entire forum but so no previous reference to this problem. Any ideas? Thanks.
Thread Starter
MBWorld Fanatic!
Joined: Sep 2016
Posts: 1,189
Likes: 187
From: TX
2023 GLE3502W, 2024 GLC3002W, 1967 Pontiac GTO 4 sp (sold...sniff)
Thank you for the suggestions. ECO mode must have been on all the time yesterday, even though there was no light on the dash indicating on or off. I think it was on. So I watched today to make sure ECO mode was off and the car cooled much better. I guess my issue is self inflicted. My 2 previous MB's were a '14 GL450 and a '17 GLS550. Both had light colored dashes. The GLC is black. And the a/c feeder lines are right under the top of the dash. The temp of the dash gets extremely hot. Using a windshield cover helps when parked but once underway the sun starts to bake the dash. I couldn't hold my hand on it. I have an a/c vent thermometer and a temp gun. I'll put them in the car and try to remember to do a comparison and post the results. Also need to check on Comfort Zone. Thanks again.
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MBWorld God!
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Thank you for the suggestions. ECO mode must have been on all the time yesterday, even though there was no light on the dash indicating on or off. I think it was on. So I watched today to make sure ECO mode was off and the car cooled much better. I guess my issue is self inflicted. My 2 previous MB's were a '14 GL450 and a '17 GLS550. Both had light colored dashes. The GLC is black. And the a/c feeder lines are right under the top of the dash. The temp of the dash gets extremely hot. Using a windshield cover helps when parked but once underway the sun starts to bake the dash. I couldn't hold my hand on it. I have an a/c vent thermometer and a temp gun. I'll put them in the car and try to remember to do a comparison and post the results. Also need to check on Comfort Zone. Thanks again.
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GLE 580
Thank you for the suggestions. ECO mode must have been on all the time yesterday, even though there was no light on the dash indicating on or off. I think it was on. So I watched today to make sure ECO mode was off and the car cooled much better. I guess my issue is self inflicted. My 2 previous MB's were a '14 GL450 and a '17 GLS550. Both had light colored dashes. The GLC is black. And the a/c feeder lines are right under the top of the dash. The temp of the dash gets extremely hot. Using a windshield cover helps when parked but once underway the sun starts to bake the dash. I couldn't hold my hand on it. I have an a/c vent thermometer and a temp gun. I'll put them in the car and try to remember to do a comparison and post the results. Also need to check on Comfort Zone. Thanks again.
Thread Starter
MBWorld Fanatic!
Joined: Sep 2016
Posts: 1,189
Likes: 187
From: TX
2023 GLE3502W, 2024 GLC3002W, 1967 Pontiac GTO 4 sp (sold...sniff)
Update. Vent temp when car is first started was low 30's. Dash was garage temp 80. Made 3 stops. At end of third stop vent temp was 40, dash temp was 160. Used an old trick. Lowered the front windows for 2 mins to blow out the superheated air snd replace with 90. Vent temp stayed at 40. Set auto at 68 for each side and noticed fan speed seemed to be low. Turns out the setting was send air to the windshield, dash vents and floor vents. Set it to dash vents only which was a great improvement. Anyway by y sure ECO is off and the vent setting is dash only the air temp in the car is now acceptable. Thanks for everyone's help. BTW looked at window tinting. Will consider it.
MBWorld God!
Joined: Dec 2019
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Update. Vent temp when car is first started was low 30's. Dash was garage temp 80. Made 3 stops. At end of third stop vent temp was 40, dash temp was 160. Used an old trick. Lowered the front windows for 2 mins to blow out the superheated air snd replace with 90. Vent temp stayed at 40. Set auto at 68 for each side and noticed fan speed seemed to be low. Turns out the setting was send air to the windshield, dash vents and floor vents. Set it to dash vents only which was a great improvement. Anyway by y sure ECO is off and the vent setting is dash only the air temp in the car is now acceptable. Thanks for everyone's help. BTW looked at window tinting. Will consider it.
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GLE 580
Yes and tinting windshield is illegal in most places but depending on the jurisdiction, some places will never bother you. For example Llumar Air 80 (ceramic) isnt noticeable for
.
Here's a good tint reddit thread to get you familiarized.
Here's a good tint reddit thread to get you familiarized.
MBWorld God!
Joined: Dec 2019
Posts: 32,368
Likes: 6,327
Yes and tinting windshield is illegal in most places but depending on the jurisdiction, some places will never bother you. For example Llumar Air 80 (ceramic) isnt noticeable for most people.
Here's a good tint reddit thread to get you familiarized.
Here's a good tint reddit thread to get you familiarized.
