Bigdw
New Member
I need to replace the glow plugs on my 2006 w221 S320cdi, the engineer who services my car advised Me to use Mercedes originals as he fitted a set of Bosch ones to a 320cdi engine and the car started having problems, ended up taking it to Mercedes they told him that The Bosch ones caused Voltage spikes, they were changed to Mercedes originals and there were no further problems, anyone any advice or thoughts on this