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S-Class (W222) 2014-2020

Major condensation on garage floor?

Old Jan 22, 2026 | 09:48 PM
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s550 4Matic
Major condensation on garage floor?

This is a weird question, but does anyone know why there are major puddles on my garage floor after I park my S560? My wide is pretty annoyed as it does not happen with other cars that we have/use. See pictures attached. While these pictures reflect parking after picking up some salt on the roads, the puddle/condensation is much more than any car I have used
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Old Jan 23, 2026 | 05:11 AM
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maybe when you shut car off afer driving with AC on the evaporator drain still has condensate water dripping off onto floor.

All my cars do it.

Put one of these under car:
Containment Mats by Trucontain for the Garage Floor. Best Seller

Garage Floor Mat With Ribbed Pattern

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Old Jan 23, 2026 | 12:32 PM
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2019 S560, 2015 Honda Civic Hybrid
Interesting! My S550 used to leave white spots like this below the rear diff, far from the A/C condensate drain. Never any sign of leaks from the car, and never had this with any other car before the S-class ...
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Old Jan 23, 2026 | 02:39 PM
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Salt going to salt on the floor. Often due to snow slowly melting under the car. You can have that fourth season!

Humid climates will make for a LOT of water continuing to drip from HVAC after turning the car off.
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Old Jan 23, 2026 | 03:38 PM
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2020 S560 4matic. 2017 Z06 convertible.
Some mufflers have weep holes in them too.
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Old Jan 23, 2026 | 05:05 PM
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Originally Posted by Z06Life
Some mufflers have weep holes in them too.
In a similar fashion, but unlikely, if there is an exhaust leak condensation will form.
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Old Jan 23, 2026 | 05:10 PM
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Its because of all the covers that are under the car. Water gets above them and it drains out as the car sits there.
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Old Jan 24, 2026 | 10:01 PM
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Originally Posted by Tom in Austin
Interesting! My S550 used to leave white spots like this below the rear diff, far from the A/C condensate drain. Never any sign of leaks from the car, and never had this with any other car before the S-class ...
Yup. That's my experience. Did not happen with other cars that I have owned
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Old Jan 27, 2026 | 10:48 AM
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Originally Posted by ygmn
maybe when you shut car off afer driving with AC on the evaporator drain still has condensate water dripping off onto floor.

All my cars do it.

Put one of these under car:
Containment Mats by Trucontain for the Garage Floor. Best Seller

Garage Floor Mat With Ribbed Pattern
Thank you! Will check these out
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