# 1977 Mercedes-Benz SL-Class - climate control blower switch

**URL:** <https://community.cartalk.com/t/1977-mercedes-benz-sl-class-climate-control-blower-switch/186577>\
**Category:** Maintenance/Repairs\
**Tags:** mercedes-benz, sl-class\
**Created:** [September 27, 2022, 2:04am UTC](https://community.cartalk.com/t/1977-mercedes-benz-sl-class-climate-control-blower-switch/186577 "2022-09-27T02:04:11Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![smittymail](https://avatars.discourse-cdn.com/v4/letter/s/a183cd/32.png) [@smittymail](https://community.cartalk.com/u/smittymail)\
**Post date:** [September 27, 2022, 2:04am UTC](https://community.cartalk.com/t/1977-mercedes-benz-sl-class-climate-control-blower-switch/186577/1 "2022-09-27T02:04:11Z")

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climate control blower switch

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**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\
**Post date:** [September 27, 2022, 11:23pm UTC](https://community.cartalk.com/t/1977-mercedes-benz-sl-class-climate-control-blower-switch/186577/2 "2022-09-27T23:23:53Z")

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I’m guessing either faulty switch, or faulty blower resistor. Is it only the low speed that’s not working? If so, blower resistor is probably the problem.

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**Author:** ![smittymail](https://avatars.discourse-cdn.com/v4/letter/s/a183cd/32.png) [@smittymail](https://community.cartalk.com/u/smittymail)\
**Post date:** [September 27, 2022, 11:36pm UTC](https://community.cartalk.com/t/1977-mercedes-benz-sl-class-climate-control-blower-switch/186577/3 "2022-09-27T23:36:54Z")

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Low speeds 1 and 2 are fine, but it loses detent and it’s nigh impossible to get speeds 3 and 4 to lock.

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**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\
**Post date:** [September 27, 2022, 11:41pm UTC](https://community.cartalk.com/t/1977-mercedes-benz-sl-class-climate-control-blower-switch/186577/4 "2022-09-27T23:41:46Z")

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Seems more like a faulty switch then. The best solution? Ask your shop to verify the switch is bad, then replace the switch.

Note: Suggest to edit your post to remove the personal data. Click pencil icon.

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**Author:** ![weekend-warrior](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/weekend-warrior/32/26122_2.png) [@weekend-warrior](https://community.cartalk.com/u/weekend-warrior)\
**Post date:** [September 27, 2022, 11:43pm UTC](https://community.cartalk.com/t/1977-mercedes-benz-sl-class-climate-control-blower-switch/186577/5 "2022-09-27T23:43:41Z")

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You should delete your personnel info. this is an open forum, and you never know who will stop by.

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**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\
**Post date:** [September 28, 2022, 1:02am UTC](https://community.cartalk.com/t/1977-mercedes-benz-sl-class-climate-control-blower-switch/186577/6 "2022-09-28T01:02:23Z")

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@cdaquila A little edit work for you Carolyn. Stephen forgot to post his bank account numbers.

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**Author:** ![old\_mopar\_guy](https://avatars.discourse-cdn.com/v4/letter/o/6bbea6/32.png) [@old\_mopar\_guy](https://community.cartalk.com/u/old_mopar_guy)\
**Post date:** [September 28, 2022, 3:20pm UTC](https://community.cartalk.com/t/1977-mercedes-benz-sl-class-climate-control-blower-switch/186577/7 "2022-09-28T15:20:55Z")

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So just have the switch replaced.