Auxiliary heater?

Graham couch

Graham couch

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Joined
Jul 10, 2017
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Your Mercedes
SLK200 R171 2004
When I put my heater on in my Slk 200 I can hear a wirring noise, it's not the fan but a noise that stays on after the fan is turned off, and it does get warm quick, is this an auxiliary heater? If so how does it work?
 
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Craiglxviii

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Cambs UK
Your Mercedes
970 Panamera Turbo; W221 S500L AMG Line, C215 CL500, W251 R350L AMG Line, plus several more now gone
It won't be an aux heater, they're a specific unit. MB petrols DO warm up within a few minutes so I suspect it's a warm air bypass system.
 
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Graham couch

Graham couch

Member
Joined
Jul 10, 2017
Messages
13
Reaction score
1
Your Mercedes
SLK200 R171 2004
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Oh ok thanks
 
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