e55joe

Car died as i was driving. Did some reserch and cam to the conclusion it was crank position sensor. Changed the sensor today and still car wont start. What else could it be camshaft sensor. Or other. If its cam sensor what part number is it so i can order it thanks

BoostedAero

Check fuel pressure at the rail and inspect the fuel relay in the back right of the trunk (behind carpet).Roasted relay = need new fuel pumps. I have had both leave me stranded (CPS and Relay) Bbirdwell has some great posts about diagnosing fuel issues fwiw

Dont keep throwing parts... CPS will cause a CEL, fuel relay will not. Get a proper diagnosis before you keep chucking money down an abyss

MTV10

Happened to me last year on the highway.

I had my fuel pumps replaced a month prior by the MB dealer due to the fuel sender recall. Car just shut off on the highway and left me stranded. Checked relay, CPS, etc, etc....

Ended up replacing the fuse to the fuel pump relay and BOOM ! She fired up. 2 Months down the line, fuse popped again. Turns out the dealer inversed the polarity on the fuel pumps. Could have blown up......

bbirdwell

this thread:
https://mbworld.org/forums/w211-amg/...ng-my-car.html
And posts 7 and 8 in this thread:
https://mbworld.org/forums/mercedes-...tcs-ideas.html

FWIW, my car was at 92,000 miles on original pumps. Believe you me, I now check them every oil change and will replace after 60,000 miles without fail.

If you replace relay, pumps, and filter, ensure you order all of the cables required to install! The new fuel sending unit (filter/regulator) requires an adapter cable, and the new fuel pumps also require an adapter cable as one of the new pumps is reversed polarity compared to the one originally installed.

There is also some padding intended to shield the fuel pump harness from the metal lid covering the pumps. That would be a very bad place for a 30-amp circuit to short out under the seat.

Also, when installing new pumps in a previously owned car, check the color code on the harness to the fuel pumps before connecting. As I stated, there is an adaptor cable that reverses polarity one pump; some owners (see above) just reversed the pins without using the adapter cable. Not an issue unless a future owner or shop sees the adapter cable missing and decides to install said cable which defeats the purpose of the previous owners wire swap.

s.i.f.i.

When my car did this it was fuel pump fuse, weeks after warranty gas tank replacement. It went riiiight back to the dealer for checkup but they found nothing wrong with the install and everything has been fine since. Since this was 30k miles ago, I'm not worried about it.

PJmak

Mine died on the highway.

Turned out that the fuel level sensor was bad and was reading close to half tank of gas but the gas tank was empty.

Check that you have gas before you go replacing everything

bbirdwell

I use both the gauge and my trip odometer. This due to owning a couple of cars with inaccurate fuel gauges. If I have 300 miles since fill up and the gauge is still reading half full, I know there is a problem.

Although there was a joker here at work who, when a co-worker was bragging about the great fuel mileage of his import gas saver, would sneak out at lunch time and add a gallon or two of gas to the car. After a couple of weeks of the new owner crowing about his amazing fuel mileage, the joker started sneaking out at lunch and removing a gallon or two. Oh, the wailing of the new owner trying to figure out why his fuel mileage suddenly was that of a 400 c.i.d. Detroit motor!

Redwood415

these type of breakdowns are almost always related to fuel pump and or relay failure. Always remember that these pumps are uprated to flow a whole lot more fuel than your run of the mill E320 or even E500, filter unit assembly must be changed every 50K miles to ensure reliability (factory says 60K) yes it's expensive but can be the difference between premature pump failure or not.

e55joe

I just had the whole tank and pumps fixed under the warranty at dealer.