SZMB

2004 CLK320 w/ 60k mi CPO. While driving and w/ the radio on in normal volume, on a few occasions the volume suddenly jumps to the maximum for a couple of seconds and then backs down to either normal or very low. This has happened at least 10 times in the past 2 months. I took it to the dealer 2 months ago, and they couldn't reproduce the problem, but they changed the amps anyway. Last month I took it again for the same problem, and they couldn't find anything wrong. They said they'll need to charge me inspection fee if i take it in again for the same problem, even though it's a CPO. Has anyone experienced this problem w/ the radio?

KwlAznKid

sometimes mine jus shuts off and turns back on after a few seconds.. but wow that is strange...

JrZkidd

my volume drops off sometimes and then stays low for a few seconds. i have a feeling its the burning software im using to burn my, not sure. but ur problem is mos def strange. gL

2MCHCAR

Our sound systems have among other things, a microphone that measures cabin sound levels and adjusts the volume accordingly (the highway is loud so volume is adjusted up, when you get off the highway, volume automatically goes down). If this part of the system is malfunctioning, it would cause the problems you're describing.

SZMB

That sounds like a reasonable explanation. I need to contact the dealer and get this problem before the CPO warranty expires this summer.

dr_feelgood

I used to have that annoyance before when I had my w203. Ever since I had my w208 then the w209, I did not notice it anymore to warrant a visit to the dealer. What i did was pay them a visit and they changed my car's settings.

SZMB

Do you remember what settings they'd changed? Was it exactly the same problem as the one I've described above?

dr_feelgood

it was around 8 years ago. dont remember what the setting was. All it told them was that i noticed the volume go up and down and when i got the car they said they had to change a setting. however, if you say that your volume goes up to max then down then i think we have a different problem. mine was just a fluctuation on the volume. take it to another dealership and see if they can find the problem. i go to the one in walnut creek though.

CakeDaddy

is there an issue with scanning radio stations with the controls on the steering wheel. Our previous 208 would let you scan station with wheel buttons, but the 209??? Am i missing something

CakeDaddy

alright..... Im going to answer my own question.

I just found out that Mercedes skipped out on this function. The freq/preset function isnt available under the conveience setting.

CLK Masters

it's the Bose audioilot system that adjusts the sound level in relation to the amount of ambient noise, do you have a system in your car? (subwoffers)

I had this exact problem, my solution was to take out the microphone for the audiopilot system, it located in the roof behind the sunroof panel. took about 10 min to take it out.

directordat

i have the same problem right now..after i listen to the radio for about 5 mins. the volume starts jumping....started happening after i connected my aftermarket sub and amp..

MB Dave

ditto same here, I disconected the mic and problem gone

v12

Best solution...rip that crappy MB headunit out and start from scratch with something decent.

directordat

can you give me some details where and how i can disconnect the mic? will it work if i reconnect it? im a noob

how much does it cost to replace radiator to behr?

drusus

There is also the option to turn it off in the maintenance menu on the radio. I don't remember the codes, but if you do a search you'll find it. The dealership should know how to do this too.