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W210 Wont rev over 1k

8969 Views 20 Replies 6 Participants Last post by  icy75
I went to start my car yesterday and all I got was a single click, I presumed it was a dead battery (battery is about 3 months old) car is not used much, when I took the battery off the earth terminal was wet and rusty, in fact the nut has rotted away the terminal pulls on and off the pole with slight force, I dried the pole charged the battery overnight, I put the battery on this morning and I still just get a click, I know the battery is fully charged and is healthy, if the battery was faulty my charger would tell me.

Where is the moisture coming from on the negative terminal nothing else is wet?

I have replaced the earth strap, the old one was a mess, there is nothing else under the seat that was damp just the earth terminal.

The car now starts perfectly fine with the first turn of the key since changing the earth strap, however a new problem has manifested in that I have absolutely no power whether it be forward reverse 1 or 2, on tick-over it isn't steady and rapidly rises and falls, if I put my foot on the accelerator I get a miniscule response, I do have a 38 pin fault code reader which didn't pick up anything.
When I last moved the car about a week ago it was running very smooth it seems strange that suddenly after the battery incident the car has thrown its teddy out of the pram and stubbornly refuses to move.

I have had BAS/ESP & SRS lights on for a while which I was going to get reset this week or see if there's any problems if it wont reset, but today since putting the battery back on I suddenly have anti skid warning flash up on dash as well as the ABS warning on screen (the car wasn't moving )

The car wont accelerate past 1k revs which made it interesting as I had already rolled off the drive ok in reverse before discovering this fault and was then stuck across the middle of the road and the car could literally move a few milimetres on its own steam.

I have had lots of cars before in fact this is my 40th car and have never seen any with problems such as with this car, I will never buy another Mercedes again once I finally manage to get rid of this one.
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@ Kajtek1 I flew back home last night from a mini break to find a new meter waiting, so bee out this morning to check.

Before starting the car it was reading 12.33
As soon as I started the car it went to 13.97
and was slowly increasing after around 2 minutes it had gone to 14.03 where it seemed to settle.

@ magna steyr I dont have this battery, nor did the one which I removed, I also have 2 friends with E class and neither of them have this type of battery fitted, I have just had a look and I can see where a exhaust pipe would go, however this has a blanking plug over it, I am wondering if UK spec cars have this tube :confused:
everything is now bone dry
They do have this. When I bought a new battery from Kwik Fit, there was a blanking plug on each end. I removed the one on the left and connected the tube to the hole in the should do this to vent the explosive gasses.
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