Hi to everyone , Im new to the forum and new to Mercedes. Just recently bought a 2010 E350 Cdi with 69000 miles on the clock and I love it. (Great combo, Blue with cream interior). What I've noticed is every morning when i start the car cold the rpm goes up and down for 5mins and it feels the car is slightly shaking. Once it gets warm i slightly depress the accelerator and bring the rpm up few times and the car goes to normal and rpm stable. Once it gets to normal temp the car is great. It puts a smile on my face every-time I drive it ! What ive also noticed its a strange smell sometimes around the car when i stop. Can all of the above be related to the DPF ? Maybe a bad glow plug ? ( Ive just had a B service 2 weeks ago ) If anyone has any suggestions , let me know, but ill be booking a scan soon to check for any error codes. Thank you all in advance !