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I'd be cautious using high pressure power washer under the hood of these w124s.
Cover all electrical and boxes, accordingly. I use these - buy them in bulk as I go thru them when I do power wash on the property and driveways.
I did one recently, w124, and used this with non-chlorinated brake cleaner (I get this from my colleagues shop as he buys by it by the drum), or you can use a smaller hand pump style. Access from the topside and then flush it with a hose. Underside, I attack it on hoist. You can use ramps too.
Cover all electrical and boxes, accordingly. I use these - buy them in bulk as I go thru them when I do power wash on the property and driveways.
I did one recently, w124, and used this with non-chlorinated brake cleaner (I get this from my colleagues shop as he buys by it by the drum), or you can use a smaller hand pump style. Access from the topside and then flush it with a hose. Underside, I attack it on hoist. You can use ramps too.