Rear suspension

Sister in law has an 2003 mercedes e200 estate and both rear side are to low to even get a jack under it, eventually getting it raised up expecting to see leaking shocks but there was shocks and bilstein air bags. From googling it says that there is a air compressor under the passenger headlight (Irish car) but when she rang a mechanic they said there is no compressor in that car any help would be greatly appreciated