Sticking auto box when cold '56 E220 CDi

[Messa]

Hi all,

I have only had the car a couple of weeks, it is a '56 E220 CDi and most mornings when the car is cold and I drive off the box sticks in 1st way longer than it should, up to about 4000rpm.

There is then a massive 'snatch' into 2nd that almost launches me off the seat, and then sometimes (but not always) within a split second goes straight to 3rd.

It is obviously worse in 'S' mode from 1st to 2nd but it does do it if I start in 'E' (from 2nd to 3rd I presume).

It does this until the box has warmed/lubricated.

Warm driving is alot better, but the gearchanges both up and down do not feel anything like as smooth as they should be. My last car was a '04 model and that was a vastly superior change to this.

I have googled and I know the box holds the gears higher when cold to lubricate/warm etc but this is way more severe than that.

The car has covered 29k and I know its previous owner and they are 90% motorway miles.

If anyone has any clues, would you also know if this is covered under warranty?

Thanks you.

 

[Stu_CDX]

To be honest, 4k RPM sounds about right. Our W124 E280 revvs the nutts off of itself for a couple of changes from 2nd to third and you do get a massive surge of power into third. To be honest, if it's THAT bad, take it back to Merc under warranty.

 

[rf065]

Abnormal gear changes can be caused by an electrical connection / oil seal that fails on the gearbox & allows oil into the gearbox ECU or wiring loom.

I had mine replaced under warranty and it is a very common fault.
Let MB have a look, simple to fix if caught in time.

Russ

 

[Messa]

Hi, thanks, I have booked it in I will let you know the outcome.

Neil

 

[Messa]

Stu I appreciate your help but honestly 4k rpm is nowhere near right, it is only 500rpm off red lining, it normally changes around 2k rpm.

It did it again this morning.

Neil

Hi, thanks, I have booked it in I will let you know the outcome.

Neil