Mercedes-Benz Forum banner

Vapor Lock?

5135 Views 10 Replies 6 Participants Last post by  cookie79
I am a new member who has recently purchased a 1979 450SL. I purchased the car approximately 200 miles from my home. 150 miles on the trip home the car died while I was traveling at 70 MPH. After pulling to the side of the road I tried to start the car. It would turn over but not start. I continued doing this over a period of thirty mintes. Each time the engine came closer to turning over and starting. At the time the tow truck arrived the engine turned over and started.
The next day the car started and is running smoothly, but I have no confidence in driving this vehicle for an extended time.

My questions are:

Has anyone else experienced such a problem?
How was it solved?
Could this be a vapor lock problem?
If it is a vapor lock problem, what is the cure?

Looking forward to reading your opinions.


Cookie 79
1 - 4 of 11 Posts

Thanks for the reply. I'll give that a shot. I did take the car out this past week for a 60 mile test run. No problems. Maybe next weekend a 90 mile trip. As to the BTW question I do not hear any humming or buzzing from the rear. If I did what, would that mean?
Took it on a 120 mile round trip ride. No problems. Would that mean that the fuel lines are not the problem?
Cookie79 1979 450 SL photo

ussun said:
I had that happen to when I bot mine but it was raining and..... Just before my friend showed up it started. Never happened again. I told my indy mach and he said when it totally fails he'll find it but it never did. Welcome to the world of SL but keep driven it they love that and post some pics
This is the newly purchased 1979 450 SL.


See less See more
1 - 4 of 11 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.