Thunderdome66

Just trying to see if I,m right but my car over the last couple weeks has been getting harder and harder to start when hot but perfectly good when cold then today it took several tries to start when hot I,m thinking crank position sensor any input appreciated thanks in advance

ratha67

Maybe the CPS, but also have you tried adding distilled water into your battery?

https://mbworld.org/forums/clk-class-w208/250488-anyone-here-add-water-battery-regularly.html

Thunderdome66

the battery seems fine the engine spins no problem just doesn,t fire after a few cycles it fires right up?

ApproachingZero

My GF's ML430 just had the CPS replaced. When it got really hot out she would stall at the traffic light and it would just crank until you let it rest for 3-5 minutes. It was random but always with the AC on and a hot day.

We first replaced her battery b/c there was no water in it at all but in less than 72 hours she stalled again. I searched the forums and saw the CPS issue with the 430 engine. We got it to the dealer and they sourced the code right to the CPS. When the CPs is out the engine dosen't know what to do. It can;t set up a spark pattern to get it going.

Total: $450 parts and labor, no more stalling

JYOO

I payed 220 to have the CPS repaired that included the towing. 450 sounds outrageous.

ApproachingZero

[QUOTE=JYOO;2921373]I payed 220 to have the CPS repaired that included the towing. 450 sounds outrageous.[/QUOTE

It was only $400 for the CPS change. My GF got an oil change too. I forgot about that one

Where the hell do you live? Did you get it done at the dealer?

I think the CPS alone was $200.

JYOO

I live in LA, no i got it done at a Mercedes specialists shop.

ApproachingZero

That's diffrent then.

Out here we have only 1 or 2 good shops that can work on Benzs without throwing parts at them. Those places charge about the same as the dealer b/c they know they can get away with it.

Thunderdome66

turns out it was the cps sensor bought from dealer 185 in Canada 1 week now no more problems