Locks don't work after 30+ minutes - PeachParts Mercedes-Benz Forum

gtmotor · #1 06-15-2006, 12:31 PM

Hey guys,

My 83 300D turbo is running great but it has another vacuum problem. If I let the car sit for over 30 minutes the key only unlocks the door I stick it in. If I use the key to lock/unlock the car within 30 minutes of shutting the motor down all the automatic locks work (Will work at least 5 times).

I assume there is some sort of vacuum canister/accumulator that has a slow leak somewhere. Can someone help point me to the problem?

Thanks

TheDon · #2 06-15-2006, 12:42 PM

id check the door vacuum actuators first. those are known to leak. then onto connections. got a mity vac and some golf tees?

#3 06-15-2006, 01:00 PM

Yup, you have a slow leak someplace in the system. FWIW, the last two times my system leaked it was the fuel door actuator.

gtmotor · #4 06-15-2006, 01:27 PM

Quote:

Originally Posted by Craig

Yup, you have a slow leak someplace in the system. FWIW, the last two times my system leaked it was the fuel door actuator.

There is a fuel door actuator? I've been just opening the fuel door with my fingers

Maroon 300D · #5 06-15-2006, 01:35 PM

The fuel door actuator would be the mechanism that uses vacuum to lock and unlock the fuel door.

gtmotor · #6 06-15-2006, 01:44 PM

Quote:

Originally Posted by Maroon 300D

The fuel door actuator would be the mechanism that uses vacuum to lock and unlock the fuel door.

uhh... at the risk of sounding like a total newbie (I am one)... where do I find the switch to open the fuel door?

I looked around at the diesel station for it for a few seconds then just went around and opened the door with my hand. It had no resistance or anything.