Hi

I was driving with my dad today. He accelerated hard to pass a truck. The gearbox kicked down and the car was just starting to accelerate when there was a loud bang that sounded like a gunshot. I can't remember exactly where the bang came from but it didn't sound like the exhaust area. Now the car won't rev past 2k rpm unless you manually change down. I think this is 'limp home' mode? We're going to call the local dealer in the morning. I'm just wondering if anybody has any ideas?
It's the 2004 S320 CDi - done 78k and has the 5 speed auto transmission.

Thanks in advance
Ollie

__________________
Oliver

They are having trouble with crank sensors.Hopefully.

__________________
1999 w140, quit voting to old, and to old to fight, a god damned veteran, deutschland deutschland uber alles uber alles in der welt

Thanks for the quick reply. If it is the sensor, do you know what the bang would have been caused by?

Thanks again
Ollie

__________________
Oliver

Plugged cat?

The diesel mainly uses the CPS to provide signal to the tach; it does'nt provide timing as it does on gassers.

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

I've just checked plugged cat symptoms on google and it does sound similar - thanks! I'll post the results after the dealer has had a look.

__________________
Oliver

It could also be as simple as the acc belt tensioner broke too.

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

Actually, since Cdi's use electronic injectors/such precise injection, I bet the CPS DOES play an important role in timing. The injection is all done by computer, just like on a gasser.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

I'll let you know what the outcome is when we get the car back. Thanks for all the replies.

Ollie

__________________
Oliver

Let the shop figure it out, chances are something in the trans let loose and youre right it does sound like its in limp home. I'd assume the check engine light is on now too?

__________________


1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350

Sounds to me like an intercooler hose popped off. At one of my old jobs we had a truck that would do this periodically and it sounds the same-loud pop followed by lack of power.

__________________
Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.