Cls63 5.5tt remap or not?

[MysticBlueCLS63]

Hi guys, i tried getting it mapped a while back from a very well known company and within 10 minutes it starting blowing coil packs and spark plugs, so i had it put back to stock and changed all new packs and plugs from mercedes,

I am at dilema as part of me wants it mapped for that extra smoothness but i am also scared of the aggravation of having things going wrong on it,

Car only done 35k and not long a go had major service inc gearbox services, oils and
Filter and plugs and a few coil packs.

What you think, was it the tuner bad or are all cars going to have similar issues once mapped?

Any help would be appreciated.

 

[Alex]

How do you blow a coil pack or a spark plug? I'd do it again, just to make sure.

On a serious note, M157 appears to be a bit sensitive when touched by broad range remapping specialists.

Here we touched on the subject of tuning. You may find the input useful.

 

[Alienator]

Hi guys, i tried getting it mapped a while back from a very well known company and within 10 minutes it starting blowing coil packs and spark plugs, so i had it put back to stock and changed all new packs and plugs from mercedes,

I am at dilema as part of me wants it mapped for that extra smoothness but i am also scared of the aggravation of having things going wrong on it,

Car only done 35k and not long a go had major service inc gearbox services, oils and
Filter and plugs and a few coil packs.

What you think, was it the tuner bad or are all cars going to have similar issues once mapped?

Any help would be appreciated.

I'm in the same boots like you mate[emoji846]
Same car (facelift) and similiar millage just thinking should I[emoji848]...???
I know I want it just dont really needed issues after because all is perfect now[emoji6]

 

[Teego]

I had my CLS55 done yesterday. Custom map done with a dyno specific to my car. Nothing off the shelf. I got some very useful gains in terms of power, torque, throttle response, smooth cruising. Better all round.

After the work was done I was told that there would be several warning messages because on the dyno only the rear wheels are turning which confuses the computer. Quick drive round the bloc sorted it and everything fell back into place.

 

[Alienator]

I had my CLS55 done yesterday. Custom map done with a dyno specific to my car. Nothing off the shelf. I got some very useful gains in terms of power, torque, throttle response, smooth cruising. Better all round.

After the work was done I was told that there would be several warning messages because on the dyno only the rear wheels are turning which confuses the computer. Quick drive round the bloc sorted it and everything fell back into place.

I'm sure after remap it drive amazing but question is how long it will stay like that before something gone wrong...[emoji6]

 

[E55BOF]

Regarding remapping the M157 tt, see this thread:

It's Not A Good Sign When...

particularly posts 29,32 and 38.

Food for thought...

 

[MysticBlueCLS63]

I'm in the same boots like you mate[emoji846]
Same car (facelift) and similiar millage just thinking should I[emoji848]...???
I know I want it just dont really needed issues after because all is perfect now[emoji6]

In the same boat haha, its got plenty if power as standard but a little more would not hurt anyone especially when those 911 or m6 come along haha

 

[Atavus]

I think increasing the speed limiter is more appealing than a remap.

 

[MysticBlueCLS63]

Mine has no limit on the speedo, tried and tested already lol, but the remap is the one still debating

 

[Cyclone1]

Many, many M157 engines have been remapped and are fine. Without more details it would be difficult to say that a remap caused your coil packs and spark plugs to fail, more likely there was an underlying problem?

If you are happy with the current mechanical set up, then I’d go ahead and get it remapped. It will accelerate wear and tear on certain components but that is the same for any remapped car. Suggest you go with a Tuner that gives you a good map, they will all claim they do but some have learnt from the early days of mapping the M157 engines and now have more optimal maps.

I ran an safe map, aggressive map and now run hybrid turbos with no issues (that’s nearly 40k miles).

Good preventative maintenance, regular servicing, identifying and eliminating the known issues and importantly, but finally a good map.

Jules

 

[Alienator]

Yesterday emailed Renntech in Germany and today had reply...


''...Thank you for your interest in RENNtech.

Our software is developed inhouse. We don’t make any compromises regarding drivability or reliability.

For the CLS 63 it’s a full developed product which does not make problems, except there are already weak points on your car before tuning it.


For your car we can offer a handheld tuner which allows you to flash the car via OBD by yourself. The same tool allows you to flash back to stock anytime. You can repeat this process as often as you want and it’s fully invisible.

The tool just needs to be connected during flashing. Then you can store it

699 PS / 513 KW @ 5500 1/min
1050 Nm @ 3800 1/min...''

 

[E55BOF]

Mine has no limit on the speedo...

I think you'll find it does. Mine with the AMG PP still has the second limiter at 184 mph, and yours probably has too.

Yesterday emailed Renntech in Germany and today had reply...

''...Thank you for your interest in RENNtech.

For the CLS 63 it’s a full developed product which does not make problems, except there are already weak points on your car before tuning it. ''

That'll be the conrods, then...

With only 35K on the engine, I wouldn't worry about it, though. If it does go wrong, and most probably don't, you'll long since have sold it before the problem becomes apparent.

I think they're wrong about the reflashing being 'fully invisible', by the way, but it would need an expert with the right piece of kit to find the traces.

 

[Teego]

I wouldn't want to go down the Renntech DIY route. I was with my specialist every stage when he did my custom map on the dyno.
Also, he totally deristricted the car. 183mph in 4th. Would have gone on to 200mph+ in 5th but tyres only rated to 186mph.

 

[MysticBlueCLS63]

Anyone use velos werks? Apparantly they seem to be well know on mbworld,?

They too send out a device to do it yourself?

 

[Cyclone1]

That'll be the conrods, then....

How many M157 engines have failed conrods? Is it a high percentage? I only know of yours in the UK.

With respect to your car, you bought it with what appears to have been problems early in its life, that manifested in the failures at high mileage while you’ve owned it.

 

[E55BOF]

How many M157 engines have failed conrods? Is it a high percentage? I only know of yours in the UK. With respect to your car, you bought it with what appears to have been problems early in its life, that manifested in the failures at high mileage while you’ve owned it.

I don't know of any others, but mine is above average mileage. I've wondered, though, how many are out there running around with one or more slightly bent conrods, but the problem hasn't shown up yet. If the damage indeed started on mine early in its life, it's taken a long time to show up, which is why I advised Alienator not to worry with an engine with only 35K on it.

If I were thinking of buying another, I'd want it on a Star before buying to see if there was the slightest hint of misfire codes at any time in the past, and if there was, I'd walk away.

(Unless, of course, the owner was incredibly reasonable, and dropped the price by £12K. In that case, I'd go straight out and buy a lottery ticket while a flight of pigs flew overhead...).

 

[Cyclone1]

I don't know of any others, but mine is above average mileage. I've wondered, though, how many are out there running around with one or more slightly bent conrods, but the problem hasn't shown up yet. If the damage indeed started on mine early in its life, it's taken a long time to show up, which is why I advised Alienator not to worry with an engine with only 35K on it.

If I were thinking of buying another, I'd want it on a Star before buying to see if there was the slightest hint of misfire codes at any time in the past, and if there was, I'd walk away.

(Unless, of course, the owner was incredibly reasonable, and dropped the price by £12K. In that case, I'd go straight out and buy a lottery ticket while a flight of pigs flew overhead...).

There’s probably a few but not bad enough to manifest itself as a wide spread problem on standard engines. If miss fires start to occur and codes thrown up then it’s an indicator. A lot of owners ignore this and / or the codes are misdiagnosed and the actual root cause not fixed.

It’ll mainly be poorly mapped (too high boost) and upgraded turbo cars with poor maps that could suffer with bent rods. Too much boost and lack of Additional cooling, especially in warmer climates. Miss fires and increasing oil use age are indicators.

Like I said a good and safe map is key.

How are things progressing with your car?

 

[Alex]

I wouldn't want to go down the Renntech DIY route. I was with my specialist every stage when he did my custom map on the dyno.
Also, he totally deristricted the car. 183mph in 4th. Would have gone on to 200mph+ in 5th but tyres only rated to 186mph.

The tyres are “tested” to 186. They will run more. Bring it to next Vmax in September and find out if you can go over 185?

To stay somewhat on topic, MB are clever. A bent conrod is better than a hole in the block.

 

[Teego]

The tyres are “tested” to 186. They will run more. Bring it to next Vmax in September and find out if you can go over 185?

To stay somewhat on topic, MB are clever. A bent conrod is better than a hole in the block.

I hear what you say about the tyres and know there is always a safety margin built in. I think Phil was more worried about his liability if he had blown a couple of tyres while running over 186.

 

[E55BOF]

To stay somewhat on topic, MB are clever. A bent conrod is better than a hole in the block.

An unbent conrod would be better still. E55Ks don't bend conrods...