Classic777

Hey guys, the ELW warranty on my ‘12 cls63 is about to end soon, what are some common engine issues with the M157 engine? What could I tell the MB dealer to have them check out the car free of charge? The car is currently being serviced for an oil leak to the engine harness.

Issues that I read are common is a stretched timing chain, cylinder scoring to cylinders 1 and 5 due to proximity to turbos, and a seized low pressure fuel pump. How could I get them to check out these issues?

Thank you

diamondblak05

I second that! My original 4yr/50K warranty is ending soon so I've been trying to put together a list for the dealer to check.....if they are free of course.

Classic777

can you still buy the elw? I would recommend buying it before your warranty finishes. One major repair would cover the cost of it

diamondblak05

I can still buy the extended limited warranty directly from Mercedes but the rates are crazily high compared to a normal non-AMG car. It's triple the prices for crying out loud. What have gone wrong during your ELW period that the dealer fixed?

PeterUbers

Check this thread out to guide you:

https://mbworld.org/forums/w212-amg/...63-4matic.html

my ELW has covered:

- pano roof issue
- tensioner chain issue
- air intake cloth tube replacement
- airmatic issues x 2 (pump and relay)

my b2b warranty covered:

- cps replacement
- seat belt rattle - replaced parts

Classic777

I am the second owner, the original owner purchased the elw for $5000.

List of repairs under warranty
oxygen sensor
intake manifold gasket
air suspension compressor
air suspension line hose/ valve
cooling system hose
Engine mounts replaced
radiator replaced
rear sunshade and some minor trim items

The car is being repaired right now, there was an oil leak into the engine harness and they are replacing the engine mounts again. The engine mounts were replaced 10,000 miles ago. I believe the issue might be the timing chain and not the engine mounts.

diamondblak05

Thanks for the link. Scary list...


Seems like the $5000 paid for itself quickly. I will definitely consider the ELW now. Thanks.

Classic777

thanks for the link, what do you think about my engine issue? My car shakes a little at idle. Sometimes it takes longer to start up. Could that be timing chain?

Classic777

UPDATE: my service manger just informed me that cylinder 1 has very low compression, and they haven’t been able to diagnose the issue as of yet.

PeterUbers

that could be so many things from battery to motor mounts to fuel pump to coil packs and plugs and less likely timing chain with no CEL's

Classic777

thanks, the service manager informed me that cylinder 1 has very low compression, I’ll have to wait and see what happens from here

Classic777

the plugs and motor mounts were changed less than 15,000 miles ago

PeterUbers

hopefully there isn't a cracked engine ... is the car tuned? Is it losing coolant? Weird smoke from exhaust?

Classic777

Fortunately it is not tuned, I saw black smoke coming out of the car when I was standing behind it once. It wasn’t a lot of smoke. The previous owner had the radiator and other parts of the cooling system replaced so maybe the car overheated and damaged the internals. I’m hoping they can get this all sorted out before the ELW finishes.

V-AMG

I thought the M157’s were reliable. Scary hearing all this... Good luck and keep us posted

PeterUbers

reliable relative to a civic ... no

reliable relative to a bmw 550i.... hell yes

Classic777

thanks, I definitely will!

Classic777

service manager just got back to me, he said that cylinder 1 doesn’t have low compression and it was just a faulty fuel injector. Could that actually be the cause or are they trying to get out of replacing the engine.

Classic777

why would he say it has low compression one day then say it doesnt the next day?

V-AMG

That’s pretty easy to prove, have them do a compression test in front of you. I wouldn’t just accept it without some proof.

PeterUbers

Additionally if it drives amazing then you're fine

the dealer makes a **** ton of cash on an engine replacement so if they needed to do that they would, however they would need Germany's approval

Classic777

im going to take it to an independent mechanic and have them do a compression test and to inspect the car for all faults before the warranty finishes.

Classic777

i just need to make sure that the engine is 100% perfect before the warranty finishes. I don’t want to spend $20k to replace the engine after the warranty finishes

Vrodman

Hmmm, I wasn't aware they made a bunch of money. I mean obviously they are gonna get paid for work they do. Maybe you are right though since as you all know, they dropped a spanking new M157 motor in my car 6 months ago! I was told the retail value of the motor just in the crate was $57k !!

On topic with the thread, this was actually done toward the end of the factory warranty. But my SA told me that they would have done the same thing for my ELW if that had been the case.

And Peter is correct. They did have to get approval from a factory rep for the new motor. But it was fast and painless.

Vrodman

WAAAAAAAAY more than $20k my friend! Retail is $57k in the crate, not installed.