BenzWorld Junior Member
Date registered: Sep 2012
Vehicle: 1984 300SD
Location: Salt Lake City, UT
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
New 300SD owner with a vacuum question
I just bought my first MB 5 days ago. It's a 1984 300SD. I know these things are heavily dependent on vacuum for various things to operate. Currently, the HVAC only blows out the defrost, door locks don't work, and the tranny shifts strangely.
I realize these are all vacuum-related, and I plan on doing the vacuum troubleshooting and repairing. I just wanted to get some advice from the knowledgeable members here regarding where to start. I've read that the vacuum pump check valve is a common failure, and that the vacuum pumps typically need rebuilding as well when system-wide vacuum issues occur.
What suggestions do you all have as for where to start? The cheapest I've found the vacuum pump check valve for is around $55, and the pump rebuild kit is around $125.
Any help is greatly appreciated. Thanks in advance.