2001CLK

I recently purchased a 03 e320 and have noticed weird noises coming from the engine area when I open the front doors. This is before I even put in the key. I hear relay clicking sounds and sometimes an air compressor like sound for 10 seconds.... Is this normal?? Any info is greatly appreciated.

mbuskuhl

Do you have the Sport PKG? If so, you have Airmatic suspension and the compressor sound would be the suspension adjusting itself. It does this sometimes right after you shut the car off or when you unlock the car.

Greg_S

Ours does it all the time and we have the SP.

cyclerider

My '05 CDI made lots of sounds when the doors were opened. I always thought it was the SBC waking up and getting ready.

jmorgis

I also have the '03 E320. It is the SBC brakes pressureizing the system. Its totally normal

John

ElDiabloJoe

I have the 03 E500 and those noises have always occurred. FWIW- I have both SBC and the Sport Pkg/Airmatic

EDJ

rickyfanmdr

The car makes all sorts of unusual sounds I've never heard anywhere else!lol I honestly don't even notice any more!

paulv

Last week I replaced my garage door opener and had to reprogram the HomeLink button on my E320. I left the key in the ignition and in the "On" position, and left the passenger & driver's doors open so I could quickly jump back inside after hitting the "Learn" button on the Door opener -- the car made so many beeps, clicks and whines, I thought some Star Wars druid character was trapped under the dash!!

Regards,
paul...

megabuck2

I have a strange noise from the rear of the car while driving...
noticeable thumping sound. It almost sounds like the trunk cover for the spare tire but can't be certain. Just wondering if anyone else had similar experience...

Thanks,

Mike

2001CLK

thanks!

mbzw211

That sound is the SBC system. Normal but annoying to say the least.