Loud pop in right side of dash rarely
#1
Loud pop in right side of dash rarely
2004 E55 120,000 miles. Once or twice a week when I start the car within a few seconds a kinda loud scary pop or crack sound is heard from right side area of dash sounds rather far in. I searched forums and found talk about stepper motor arms or brackets but they all referred to 8 or so clicks that happen EVERY time car is started, not just one loud one. I realize I will have to disassemble quite a bit and am up for it but would like to know what I am looking for when I do.
#2
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This place is a joke.
2004 E55 120,000 miles. Once or twice a week when I start the car within a few seconds a kinda loud scary pop or crack sound is heard from right side area of dash sounds rather far in. I searched forums and found talk about stepper motor arms or brackets but they all referred to 8 or so clicks that happen EVERY time car is started, not just one loud one. I realize I will have to disassemble quite a bit and am up for it but would like to know what I am looking for when I do.
#3
updated
Mine does the same. The 211 does not make the multiple click sound like the C class does. I haven't taken my dash out yet, but suspect its the RH defrost stepper motor arm, or more commonly, the case stop is broken. If it's the case, normally the heater case assembly needs to be replaced, but I think there may be ways to fix it without pulling the heater case out. You will still have to remove the upper dash though.
#4
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65 Chevelle Wagon w/ C5 frame, 08 ML63, 04 S600, 04 E55,(sold) 00 ML55,(sold) 98 C43-55K Swap
Mine does it too. Only when it's above 70* or so outside and it's been sitting in the sun. One pop about 3 seconds after starting the car. Haven't really cared enough about it to go any further into diagnosing it. I think it may be the case stop though.
#6
Senior Member
I had the same issue with my E500. Dealer said the case stop was broken. They replaced the case under CPO warranty. 8 hours of labor on the invoice, if I remember correctly.