Front IR windshield
Thread Starter
Member
Joined: May 2023
Posts: 78
Likes: 13
S55
Front IR windshield
Hey,
Checked manual and w220 wiki regarding this. It suppose to have Infrared transparent areas, but looking on my windshield can't spot anything. Checked number on windshield and it is: PPG SUNGATE M448
As I said, tried every angle possible, even with sunglasses, still there can't find it.
Could it be that only available area is near front mirror?
Checked manual and w220 wiki regarding this. It suppose to have Infrared transparent areas, but looking on my windshield can't spot anything. Checked number on windshield and it is: PPG SUNGATE M448
As I said, tried every angle possible, even with sunglasses, still there can't find it.
Could it be that only available area is near front mirror?
Thread Starter
Member
Joined: May 2023
Posts: 78
Likes: 13
S55
MBWorld Fanatic!
Joined: Dec 2012
Posts: 2,475
Likes: 439
From: Ball Ground, GA (N of Atlanta)
2003 S500 2007 GL450
The IR coating on W220 glass is intended to reduce interior heating, and reportedly contains iron, which has the side effect of reducing radio wave penetration. You might have noticed that your hand-held cell phone has poorer performance inside your W220. There are several "openings" in the coating that are designed to improve RF penetration - both entry and exit. It is probably correct to call these clear areas either IR windows or RF windows, but they are openings in the IR coating to improve RF penetration.
Infrared transparent areas
The infrared reflecting glass also prevents the transmission of signals through the glass by in-vehicle electronic devices (e.g. electronic toll collection devices). To allow the use of these devices in the vehicle, two infrared transparent areas (1) and (2) are placed in the windshield.
- (1) Mounting location for electronic toll collection devices (infrared transparent)
- (2) Infrared transparent area (pass-through for electronic signals)
- (3) 31.5 in (80 cm)
- (4) 19.0 in (48 cm)
- (5) 1.75 in (4.5 cm)
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Junior Member
Joined: Nov 2021
Posts: 18
Likes: 9
From: Houston
01 S430 Sport---- 23 S580 Sport
I've spotted mine when cleaning the front of the car from a 3/4 angle and the front doors open. It's a clear square spot and probably harder to see if the sun is shining.
