Engine Issues
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S350 BT 4MATIC
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All years. The g- class was designed as s rock crawler and generally low speed operation. It has never managed to depart sufficiently from its roots to be reliable for civilian high speed operation. The only thing going for it is the high resale value.
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2007 s550
Update: star code 0522. Diagnosis of tumble flap intake manifold.
Tumble flap shafts sticks in non actuated position.
Compression test next.
What would cause this code? Would it cause a misfire?
Tumble flap shafts sticks in non actuated position.
Compression test next.
What would cause this code? Would it cause a misfire?
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Joined: Jul 2009
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2007 s550
Here is what the mechanic said:
Well.. Let me tell you.. We did full engine static compression test.. Good, swapped the coils, swapped the spark plug,swapped the fuel injectors , 5 -8 , all good.. Same failure.. Cyl #8 , probe the engine computer to see if it's was sending signal to injector.. Ok. On the dynamic compression test.. It was 65psi.. While the others was 85.. We will do a leak down test next.. Narrowing down a little at a time
Well.. Let me tell you.. We did full engine static compression test.. Good, swapped the coils, swapped the spark plug,swapped the fuel injectors , 5 -8 , all good.. Same failure.. Cyl #8 , probe the engine computer to see if it's was sending signal to injector.. Ok. On the dynamic compression test.. It was 65psi.. While the others was 85.. We will do a leak down test next.. Narrowing down a little at a time
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2015 S550
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2007 s550
Manifold is coming off so he will see.
Brainstorming if it's anything else additionally
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From: Chicago burbs
2015 S550
It certainly wouldn't hurt to purchase the new aluminum flap and replace the plastic one since the manifold is coming out any way.
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From: USA
Mercedes-Benz 2007 S550, 2012 S550 4-Matic, 2014 S550 (Traded), 2015 GL450
Let us know how much he's charging to remove the manifold. I haven't had this specific issue. . .yet, so I'm interested in the cost to remove and repair a manifold - IF that is the issue. Thanks.
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S550
0703 P0335 B70 (Crankshaft Hall sensor): Check wiring of signal line and voltage. (P0335)
0851 P0444 Y58/1 (Purge control valve): Open circuit / Switchover valve permanently closed (P0444)
0629 P0300 Misfiring (P0300)
0630 P0300 Misfiring (P0300)
0632 P0300 Misfiring (P0300)
0657 P0307 Misfiring of cylinder 7: Damages TWC (P0307)
0658 P0307 Misfiring of cylinder 7: Worsening of exhaust emission values (P0307)
0660 P0307 Misfiring of cylinder 7: Worsening of exhaust emission values after engine start (P0307)
0661 P0308 Misfiring of cylinder 8: Damages TWC (P0308)
0662 P0308 Misfiring of cylinder 8: Worsening of exhaust emission values (P0308)
0664 P0308 Misfiring of cylinder 8: Worsening of exhaust emission values after engine start (P0308)
Next step, swap coil packs to different cylinders if fault code follows, replace affected coil packs. If not and engine # is within range, perform compression test “may” be cylinder head. See bulletin here: https://mbworld.org/forums/cls-coupe...ml#post6857762
0851 P0444 Y58/1 (Purge control valve): Open circuit / Switchover valve permanently closed (P0444)
0629 P0300 Misfiring (P0300)
0630 P0300 Misfiring (P0300)
0632 P0300 Misfiring (P0300)
0657 P0307 Misfiring of cylinder 7: Damages TWC (P0307)
0658 P0307 Misfiring of cylinder 7: Worsening of exhaust emission values (P0307)
0660 P0307 Misfiring of cylinder 7: Worsening of exhaust emission values after engine start (P0307)
0661 P0308 Misfiring of cylinder 8: Damages TWC (P0308)
0662 P0308 Misfiring of cylinder 8: Worsening of exhaust emission values (P0308)
0664 P0308 Misfiring of cylinder 8: Worsening of exhaust emission values after engine start (P0308)
Next step, swap coil packs to different cylinders if fault code follows, replace affected coil packs. If not and engine # is within range, perform compression test “may” be cylinder head. See bulletin here: https://mbworld.org/forums/cls-coupe...ml#post6857762
Would this item be excluded in an aftermarket warranty? Exclusions include burnt valves and valve grinding.
Would spraying some sea foam help as a temporary fix? How else could you treat the valves?
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#8 is most likely a valve guide. if left alone for a long time it will also take the valve seat and then the cam shaft with it.
head needs to come off and machined/ new guide inserted. cam lobes need to be inspected for abnormal wear.
head needs to come off and machined/ new guide inserted. cam lobes need to be inspected for abnormal wear.
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S550
MBWorld Fanatic!
Joined: Dec 2004
Posts: 4,268
Likes: 253
Newbie
Joined: Aug 2016
Posts: 10
Likes: 0
S550
0703 P0335 B70 (Crankshaft Hall sensor): Check wiring of signal line and voltage. (P0335)
0851 P0444 Y58/1 (Purge control valve): Open circuit / Switchover valve permanently closed (P0444)
0629 P0300 Misfiring (P0300)
0630 P0300 Misfiring (P0300)
0632 P0300 Misfiring (P0300)
0657 P0307 Misfiring of cylinder 7: Damages TWC (P0307)
0658 P0307 Misfiring of cylinder 7: Worsening of exhaust emission values (P0307)
0660 P0307 Misfiring of cylinder 7: Worsening of exhaust emission values after engine start (P0307)
0661 P0308 Misfiring of cylinder 8: Damages TWC (P0308)
0662 P0308 Misfiring of cylinder 8: Worsening of exhaust emission values (P0308)
0664 P0308 Misfiring of cylinder 8: Worsening of exhaust emission values after engine start (P0308)
Next step, swap coil packs to different cylinders if fault code follows, replace affected coil packs. If not and engine # is within range, perform compression test “may” be cylinder head. See bulletin here: https://mbworld.org/forums/cls-coupe...ml#post6857762
0851 P0444 Y58/1 (Purge control valve): Open circuit / Switchover valve permanently closed (P0444)
0629 P0300 Misfiring (P0300)
0630 P0300 Misfiring (P0300)
0632 P0300 Misfiring (P0300)
0657 P0307 Misfiring of cylinder 7: Damages TWC (P0307)
0658 P0307 Misfiring of cylinder 7: Worsening of exhaust emission values (P0307)
0660 P0307 Misfiring of cylinder 7: Worsening of exhaust emission values after engine start (P0307)
0661 P0308 Misfiring of cylinder 8: Damages TWC (P0308)
0662 P0308 Misfiring of cylinder 8: Worsening of exhaust emission values (P0308)
0664 P0308 Misfiring of cylinder 8: Worsening of exhaust emission values after engine start (P0308)
Next step, swap coil packs to different cylinders if fault code follows, replace affected coil packs. If not and engine # is within range, perform compression test “may” be cylinder head. See bulletin here: https://mbworld.org/forums/cls-coupe...ml#post6857762
Are we talking 4K? 5K? 6K? More?
