E-Class Coupe (C238) & Cabrio (A238) 2017 - E200, E220, E300, E350, E400, E450 [Coupes &Cabriolets]

What does this button do?

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Old Jan 16, 2026 | 01:02 PM
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Sleeper Benz's Avatar
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W223 S500 LWB 4-Matic, W222 S450 LWB 4-Matic, A238 E400 Cabriolet 4-Matic
What does this button do?

Glad to be a A238 owner now...

Didn't see this button mentioned in the manual but maybe I just missed it. What is it's function? Thanks


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Old Jan 16, 2026 | 01:16 PM
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2016 C300 4Matic traded in for a 2022 E450 Coupe
Seatbelt extender
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Old Jan 16, 2026 | 01:22 PM
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It manually extends the seat belt presenter. Useful if you sit in your car and the seat belt presenter retracts before you grab the seat belt and buckle it. You can press that button to present it again instead of trying to reach all the way back and fish the seat belt from behind your seat.
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Old Feb 5, 2026 | 12:03 PM
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W223 S500 LWB 4-Matic, W222 S450 LWB 4-Matic, A238 E400 Cabriolet 4-Matic
Thanks for the reply.

Now I need to give those beige belts a wash. Funny, one of the belts in the rear was twisted like someone installed the seat belt assembly module with the belt latch clocked incorrectly. I was able to flip the latching point under the rear seat instead of flipping the entire seat belt assembly under the top in the wheel well.
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Old Feb 5, 2026 | 12:22 PM
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Originally Posted by Sleeper Benz
Thanks for the reply.

Now I need to give those beige belts a wash. Funny, one of the belts in the rear was twisted like someone installed the seat belt assembly module with the belt latch clocked incorrectly. I was able to flip the latching point under the rear seat instead of flipping the entire seat belt assembly under the top in the wheel well.
Are you saying the seat belt buckle was twisted/reversed? That can happen and is easily fixed.

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Old Feb 5, 2026 | 01:00 PM
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W223 S500 LWB 4-Matic, W222 S450 LWB 4-Matic, A238 E400 Cabriolet 4-Matic
Yes, typically that "flip-the-latch" fix in the video works, but my rear belt was flipped/twisted even though it retracted properly. Now it lays flat on the seat as designed with the latch pointing out. Thanks for the reply.

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