1992 W124 230e automatic

[Will]

I would advise against removing the fuel pump relay if it’s working okay, the stress of pulling it out and refitting it can cause damage to the tracks connection the pins to the printed circuit board inside - they don’t usually suffer with poor contacts anyway (the relays themselves usually work or they don’t!)

Focus on the OVP for now as you have the ABS light illuminating and high idle etc, the fuel pump relay is clearly working fine

 

[FLYPOGGER]

I am a Trev also ,,funny that .

Puts us in a certain age group perhaps, not a name that

I would advise against removing the fuel pump relay if it’s working okay, the stress of pulling it out and refitting it can cause damage to the tracks connection the pins to the printed circuit board inside - they don’t usually suffer with poor contacts anyway (the relays themselves usually work or they don’t!)

Focus on the OVP for now as you have the ABS light illuminating and high idle etc, the fuel pump relay is clearly working fine

Thank you.
Regarding getting a replacement.
I assume this is the No. to look for,
89 7236 009 when looking for a replacement.
Tempted to buy a cheap aftermarket one, as a quick fix. As it would be new, if the car doesn't start, then I would assume the fault is elsewhere. If I buy second hand, and it didn't start, I could never be sure if it wasn't faulty.
I'm overthinking this,, aren't I!

I would advise against removing the fuel pump relay if it’s working okay, the stress of pulling it out and refitting it can cause damage to the tracks connection the pins to the printed circuit board inside - they don’t usually suffer with poor contacts anyway (the relays themselves usually work or they don’t!)

Focus on the OVP for now as you have the ABS light illuminating and high idle etc, the fuel pump relay is clearly working fine

 

[FLYPOGGER]

Thank you.
I'm tempted to buy a cheap
new one to see if it will run. Then buy a genuine second hand item (although that may be on the way out) I do overthinking everything
The Nos. on my relay are
89 7236 000 which I would say is the part No. I need. The other No. on my relay 061106 is just the manufacturing batch No.

 

[optimusprime]

Trevor Inspect them both for pin contact in the base . If they are corroded you will never know,thats if you dont look at them ..Had my FPR in and out scores of times, every time i do an oil change i remove it to spin the engine over until the oil pressure is in the oil ways before i start it up. So yes remove it . This is on Ebay GENUINE MERCEDES E CLASS W124 190e W201 W463 W123 FUEL PUMP RELAY A0035452005 | eBay

 

[FLYPOGGER]

Trevor Inspect them both for pin contact in the base . If they are corroded you will never know,thats if you dont look at them ..Had my FPR in and out scores of times, every time i do an oil change i remove it to spin the engine over until the oil pressure is in the oil ways before i start it up. So yes remove it . This is on Ebay GENUINE MERCEDES E CLASS W124 190e W201 W463 W123 FUEL PUMP RELAY A0035452005 | eBay

I'll get the OVP first, see what happens once I've swapped that.
Thanks for going to the trouble to find the other relay.

 

[optimusprime]

I know of a good friend who will fix you up, try him first ..or buy a chepo Chinezeum to get it up and running . My friends as a site on Ebay Rob is the guy you need HOME | ThreePointedPartsLtd

 

[optimusprime]

Try this to check your OVP relay

 

[FLYPOGGER]

Try this to check your OVP relay View attachment 154012

Nice photo, but what am I checking, and how? I have a multimeter.

 

[FLYPOGGER]

Nice photo, but what am I checking, and how? I have a multimeter.

I had problems with my 1994 motor Guzzi a couple of years ago. So simple, only 4 basic relays. Popped the cover off, cleaned the terminals. Instant result.

 

[Will]

Trevor Inspect them both for pin contact in the base . If they are corroded you will never know,thats if you dont look at them ..Had my FPR in and out scores of times, every time i do an oil change i remove it to spin the engine over until the oil pressure is in the oil ways before i start it up. So yes remove it . This is on Ebay GENUINE MERCEDES E CLASS W124 190e W201 W463 W123 FUEL PUMP RELAY A0035452005 | eBay

There’s no need to remove the fuel pump relay, his fuel pumps are working - the ABS light and high idle indicates a likely OVP fault.

Regularly pulling out and reffing the fuel pump relay with no need is asking for trouble, I’ve seen hairline cracks between the pins and the PCB tracks on more than one occasion on these causing intermittent running faults.

An old thread, but you can just about see the issue on this one - some of the fractures are so small they only cause issues when hot and are only visible under a magnifying glass:

R107 fuel relay rebuild | Engine

Hi It appears I have bad connections inside my fuel relay in my 1985 R107 280SL as bridging the connections on the relay makes the pump work.... so i have the relay out of the car. before i head into it blind with my basic soldering skils can anyone point me in a direction of a how-to...

forums.mbclub.co.uk

OVPs are relatively cheap and simple and more readily available, the fuel pump relay often less so.

If you’re concerned about cranking the engine without it firing for a couple of seconds after an oil change, just pull the ignition lead to the coil

 

[FLYPOGGER]

There’s no need to remove the fuel pump relay, his fuel pumps are working - the ABS light and high idle indicates a likely OVP fault.

Regularly pulling out and reffing the fuel pump relay with no need is asking for trouble, I’ve seen hairline cracks between the pins and the PCB tracks on more than one occasion on these causing intermittent running faults.

An old thread, but you can just about see the issue on this one - some of the fractures are so small they only cause issues when hot and are only visible under a magnifying glass:

R107 fuel relay rebuild | Engine

Hi It appears I have bad connections inside my fuel relay in my 1985 R107 280SL as bridging the connections on the relay makes the pump work.... so i have the relay out of the car. before i head into it blind with my basic soldering skils can anyone point me in a direction of a how-to...

forums.mbclub.co.uk

OVPs are relatively cheap and simple and more readily available, the fuel pump relay often less so.

If you’re concerned about cranking the engine without it firing for a couple of seconds after an oil change, just pull the ignition lea

d to the coil

It was initially a high idle, but will no longer start

 

[FLYPOGGER]

It was initially a high idle, but will no longer start

Relay arrived today.
My intention is to use my emergency starter to maintain the voltage using the positive and negative battery leads to keep the radio alive. I'll find out if I need to do this tomorrow, I'm hoping that loosening the battery clamp will give me enough room to access the OVP relay, and hold its base while separating them.

 

[FLYPOGGER]

Relay arrived today.
My intention is to use my emergency starter to maintain the voltage using the positive and negative battery leads to keep the radio alive. I'll find out if I need to do this tomorrow, I'm hoping that loosening the battery clamp will give me enough room to access the OVP relay, and hold its base while separating them.

Guys, thank you so much for telling me what was wrong. I didn't even have to disconnect the battery. Just undone the clamp, shuffled the battery forward. Relay came away from it's base easily. Moment of trepidation sitting in the car, started instantly.
I'm so happy, I had visions of having to get the car on a break down truck to a garage.
Thank you again, you guys are marvellous

 

[FLYPOGGER]

It will be the OVP relay.

Have you charged or jump started the car recently?

Thank you, it was a faulty OVP relay.

 

[Will]

No worries - glad to hear you got it sorted out