Hello. Own a '99 E320 4Matic. Have noticed what appears to be an oil(?) spot located under passenger-side rear tire area. Oil level is fine-any idea what this may be?

Thank you.

 

Rather than a WAG, why not put the car on a lift and do some self diagnostics, however, my WAG is shock, differential, brake and or rear wheel bearring fluid!!

 

I Put a pan under the vehicle-seems to be a amber-colored fluid leaking from between the two rear wheels-please advise as I don't know much about this stuff...

Thank you.

 

Not good with colors-looks like olive oil - not amber.

 

I agree withn you---it has to be -----a amber-colored fluid leaking from between the two rear wheels-------sounds like diffetential fluid---bad seal, the good news for the mechanic is that is an expensive repair!!! Bring the wife and loads of kids for the estimate process!!

 

Just an update: Brought it to a mechanic-rear differential is leaking, seals need to be replaced; also appears front has starting leaking, too. Awaiting estimate for both to be repaired. Anyone have an idea of this cost?

Thank you all for your help...

 

I'd be a little curious about that diagnosis. Gear oil is thick, typically gets dark very quickly, and has a pretty awful odor to it.

If the leak is a light colored fluid, I'd be more inclined to believe its brake fluid.

 

Regardless of one or all differential seal replacement---the differential must be removed---my guess is $1746.68

PS: If some SA says this is an easy DIY---run!!

 

$1746.00 - you're over...

 

DIY it!

New diff, new brake lines, vacuum lines, etc! Just kidding.

Diff shouldn't be horrible if you have the right knowledge and are handy with cars. If not....yea.